Finding the Fourth Proportional to 1,156,932.72, 1,735,136.64 and 408,978.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,156,932.72 : 1,735,136.64 = 408,978.72 : x
2. Step 2: Convert to fraction form
   1,156,932.72/1,735,136.64 = 408,978.72/x
3. Step 3: Cross multiply
   1,156,932.72x = 1,735,136.64 × 408,978.72
4. Step 4: Simplify right side
   1,156,932.72x = 709,633,962,052.30
5. Step 5: Solve for x
   x = 709,633,962,052.30/1,156,932.72
6. Step 6: Final answer
   x = 613,375.31