Finding the Fourth Proportional to 2,443.59, 3,665.09 and 688.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,443.59 : 3,665.09 = 688.72 : x
2. Step 2: Convert to fraction form
   2,443.59/3,665.09 = 688.72/x
3. Step 3: Cross multiply
   2,443.59x = 3,665.09 × 688.72
4. Step 4: Simplify right side
   2,443.59x = 2,524,228.59
5. Step 5: Solve for x
   x = 2,524,228.59/2,443.59
6. Step 6: Final answer
   x = 1,033.00