Do you want to get all agents running the latest engine version? and for what product?
Easiest way would be to create a new query:
System Management -> Managed Systems
Under the filter-tab scroll down to the desired product. Lets take VSE for example we choose "Engine Version (VirusScan Enterprise)" or if you also have x64 Engine add this as well.
Then select equals and enter your current or latest engine version for example: 5900.7806