add default value in column using workflow

Question

here i have one document list in which i created one extra column,now here what i wants to do is,place one default value inside this column after adding item to list.and i want to do this using OOTB workflow.

eg i have columns like

 

Title  Modified  Modified by Default Value(added column) 

----     -------       -----------      Copy

----     -------       -----------      Copy

-----   ------         -----------      Copy 

 

i want to chive the output as above.

how can i get this?