A,B and C are the stations of a triangle. As station B could not be o…

Question

A,B and C are the stations of a triangle. As station B could not be occupied a satellite station S 21.4m from B, was occupied and C were on opposite sides of the line AB. The angles measured were BSC= $61^{\circ}18'24"$ and ASC=$69^{\circ}38'12"$. The length BC=7180.55 m and BA=10357. 67m.Find angle ABC.