Finding the Fourth Proportional to 715,436.20, 987,057.57 and 443,404.83

Step by Step Solution

1. Step 1: Write the proportion equation
   715,436.20 : 987,057.57 = 443,404.83 : x
2. Step 2: Convert to fraction form
   715,436.20/987,057.57 = 443,404.83/x
3. Step 3: Cross multiply
   715,436.20x = 987,057.57 × 443,404.83
4. Step 4: Simplify right side
   715,436.20x = 437,666,098,143.22
5. Step 5: Solve for x
   x = 437,666,098,143.22/715,436.20
6. Step 6: Final answer
   x = 611,747.21