can i install file maker pro 5 on 10.8.5

This chart appears to tell what version you can run with what MacOS:

http://help.filemaker.com/app/answers/detail/a_id/4701/~/filemaker-pro-operating -system-requirements---all-versions

version 5.5.1 MIGHT run under 10.8.5, but considering they are up to version 15, I expect they will not be helpful in making it work if it does not, and will simply tell you to upgrade to a more modern version.