Finding the Fourth Proportional to 2,082.20, 3,123.60 and 695.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,082.20 : 3,123.60 = 695.60 : x
2. Step 2: Convert to fraction form
   2,082.20/3,123.60 = 695.60/x
3. Step 3: Cross multiply
   2,082.20x = 3,123.60 × 695.60
4. Step 4: Simplify right side
   2,082.20x = 2,172,776.16
5. Step 5: Solve for x
   x = 2,172,776.16/2,082.20
6. Step 6: Final answer
   x = 1,043.50