max(id) + Join Statement

in my SQL query following is the code to list out the users who have reached city MUM at last which is working properly. but if i want to know the details of that particular user from the Usermaster .... how do i do that


select userid,citycode,time
from progress as aa
where userid.id=
(select max(id) from progress as bb where aa.userid=bb.userid)
and aa.citycode='MUM'


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Fields in User Master are:
userid,USername,AgeAddress

fields in the tracking table is
userid,citycode,time




Thanx in Advance