Hi,
>How to install Windows 10 IoT core on Raspberry Pi 4?
There is currently no version of Windows 10 IoT Core that supports for Raspberry Pi 4. And you must use the 3B+ technical preview even for Raspberry Pi 3B+.
>If there is no way to install it, can you suggest suitable and powerful hardware like Raspberry Pi to install the Windows 10 IoT edition on it?
Suggested Prototype Boards for Windows 10 IoT Core.
https://learn.microsoft.com/en-us/windows/iot-core/tutorials/quickstarter/prototypeboards
>what do you think about the newly introduced Windows 10 IoT Enterprise? Can they be installed on Raspberry Pi 4?
Windows 10 IoT Enterprise is a full version of Windows 10 that delivers enterprise manageability and security to IoT solutions. It is a binary equivalent to Windows 10 Enterprise, so you can use the same familiar development and management tools as client PCs and laptops.
https://learn.microsoft.com/en-us/windows/iot/iot-enterprise/getting_started
I haven't tried it. But I think even if it can be installed on Raspberry Pi 4, the performance will not be too good.