Merg Data Table

I have 4 Tables that 4 tables i am going to show data from Database in DataTable and i have one gridview also that 4 Data Table Data i want to in Gridview All Record should be same columns All tables have 5 columns. how can i do that please help me..

i am using below code data is coming but sequence is not correct sequence is showing like attached file..

DataTable dt = new DataTable();

dt = dtPOS.Copy();

dt.Merge(dtPDA);

dt.Merge(dtTGT);

dt.Merge(dtTGTP);

gridview_HandoverForm.DataSource = dt;