I have PearPC for installing Mac virtually. Then how can I install Final Cut Pro software for this operating system.
I'm not sure if you will be happy running Final Cut Pro within PearPC.
PearPC is pretty slow and it's hardware acceleration is poor ~ besides it's emulating a PowerPC environment and hasn't been updated in 5 years.
You should probably look into running OSX within VirtualBox first.
Anyhow, one of the following topics might help you getting Final Cut Pro up&running: