Finding the Fourth Proportional to 617,411.72, 852,160.56 and 402,167.72

Step by Step Solution

1. Step 1: Write the proportion equation
   617,411.72 : 852,160.56 = 402,167.72 : x
2. Step 2: Convert to fraction form
   617,411.72/852,160.56 = 402,167.72/x
3. Step 3: Cross multiply
   617,411.72x = 852,160.56 × 402,167.72
4. Step 4: Simplify right side
   617,411.72x = 342,711,469,489.12
5. Step 5: Solve for x
   x = 342,711,469,489.12/617,411.72
6. Step 6: Final answer
   x = 555,077.69