InfoPath Dev

I have scenario here:

This form has 5 columns and the 5th column should populate automatically based on the first 4 drop down columns. I tried to create rule for the 5 th column using 'Set a field's value, but unfortunately, it it not populating depending upon the selection.

I have done populating the text based on one column value but not multiple columns. If anyone can help me, I would really appreciate.

Thanks 

How exactly did it not work?  What are the values of those dropdowns, what are the possible combinations, and what are the possible results?  The idea works.  How you implement it exactly depends on your values.  Attach your XSN if it's easier, but you'd also need to provide a matrix of possible combinations + results.

Sorry for inconvenience. I got it done.

I ws setting the rules for text field where I need the value. Now, I am setting the rules for the last drop down list. Now, if I select some value on the last drop down list, it is populating the value on the text box. Thank you.