Your diagram is not very clear , i can only see the arrows .
I am sure you know that you will need to resolve all the forces horizontally and vertically .
For horizontals , resolve all forces horizontally , then find the resultant force (Big minus small) ,
Do the same thing to vertical .
when you resolve , you also need to consider the direction of the forces , as to whether its going to the left or right side , up or down .
Give it a shot .