My math skills have lapsed and I am having a bit of trouble trying to reorganize the following formula so that I can get latitude2 OR longitude2 if all other values are known.

~distance in miles=3958.899 * acos((sin(latitude1*0.01745329252)*sin(latitude2*0 .01745329252)) + (cos(latitude1*0.01745329252)*cos(latitude2*0.0174 5329252)*cos((longitude1*0.01745329252) - (longitude2*0.01745329252))));

Any help on this would be greatly appreciated.

-Jeff