Given a list of files like: installerV1.2.3.dmg find the highest version numbered file

Given a folder of build files that might look like this:

/Build-1.dmg /Build-2.dmg /Build-2.1.dmg /Build-2.1.1.dmg /Build-3.dmg /Build-3.2.dmg /Build-3.19.dmg

Write a script that takes a path to the folder as an argument, and prints the highest build number (just the number, i.e. 2.1.1) Note: The first digit can go up to 999 and should always be present, but the second and third can only go up to 99, and might not be included.