Finding the Fourth Proportional to 1,372.50, 2,059.47 and 688.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,372.50 : 2,059.47 = 688.50 : x
2. Step 2: Convert to fraction form
   1,372.50/2,059.47 = 688.50/x
3. Step 3: Cross multiply
   1,372.50x = 2,059.47 × 688.50
4. Step 4: Simplify right side
   1,372.50x = 1,417,945.10
5. Step 5: Solve for x
   x = 1,417,945.10/1,372.50
6. Step 6: Final answer
   x = 1,033.11