The "Find in table" function will probably take you back just to the first entry in the table that corresponds to that summary total.
The summary is adding up that field, from all the rows in the table which match the Key fields (the left hand columns of the summary).
Also, the summary may be defined to work with a different filter than the one which is active in the table view.
You can see examples of all of this working if you open Classic.prn and Lesson11.xmod from the tutorial files.
Hope this helps,