Finding the Fourth Proportional to 465,462.76, 698,141.85 and 128,551.31

Step by Step Solution

1. Step 1: Write the proportion equation
   465,462.76 : 698,141.85 = 128,551.31 : x
2. Step 2: Convert to fraction form
   465,462.76/698,141.85 = 128,551.31/x
3. Step 3: Cross multiply
   465,462.76x = 698,141.85 × 128,551.31
4. Step 4: Simplify right side
   465,462.76x = 89,747,045,892.61
5. Step 5: Solve for x
   x = 89,747,045,892.61/465,462.76
6. Step 6: Final answer
   x = 192,812.52