Advanced or refined search and find (Wildcards)

[mswmacroman]

How can you search for all instances of a number format in a 2013 MS Word document such as 32.3426833, -90.1381667 where the numbers differ and they may or may not be prefaced with a negative sign? These are decimal degree coordinates of the earth. I need to locate all such in three separate word documents that are in excess of 200 pages.