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Assuming your value is in cell A1 of Sheet4 and you are looking to find out this value in Sheet1, Sheet2 and Sheet3. Then give this formula in Sheet4. I have restricted value to find out from a range of A1:Z100 of each sheet for efficent working of formula, you may change the range as per your need, smallest the range, the better one.
The formula will give you the exact cell address with sheet name.
=IFERROR(ADDRESS(SUMPRODUCT((Sheet1!$A$1:$Z$100=A1)*ROW(Sheet1!$A$1:$A$100)),SUMPRODUCT((Sheet1!$A$1:$Z$100=A1)*COLUMN(Sheet1!$A$1:$Z$1)),,,"Sheet1"),IFERROR(ADDRESS(SUMPRODUCT((Sheet2!$A$1:$Z$100=A1)*ROW(Sheet2!$A$1:$A$100)),SUMPRODUCT((Sheet2!$A$1:$Z$100=A1)*COLUMN(Sheet2!$A$1:$Z$1)),,,"Sheet2"),ADDRESS(SUMPRODUCT((Sheet3!$A$1:$Z$100=A1)*ROW(Sheet3!$A$1:$A$100)),SUMPRODUCT((Sheet3!$A$1:$Z$100=A1)*COLUMN(Sheet3!$A$1:$Z$1)),,,"Sheet3")))
Also, if you want a generalisable version of the above, which can be extended to any number of sheets, not just three, then, if you list all of your sheet names in a vertical range, G1:G3 say:
=IFERROR(ADDRESS(SUMPRODUCT((INDIRECT("'"&INDEX(G1:G3,MATCH(TRUE,INDEX(COUNTIF(INDIRECT("'"&G1:G3&"'!A1:Z100"),A1)>0,,),0))&"'!A1:Z100")=A1)*ROW($A$1:$Z$100)),SUMPRODUCT((INDIRECT("'"&INDEX(G1:G3,MATCH(TRUE,INDEX(COUNTIF(INDIRECT("'"&G1:G3&"'!A1:Z100"),A1)>0,,),0))&"'!A1:Z100")=A1)*COLUMN($A$1:$Z$100)),,,INDEX(G1:G3,MATCH(TRUE,INDEX(COUNTIF(INDIRECT("'"&G1:G3&"'!A1:Z100"),A1)>0,,),0))),"Not Found")
Regards