Finding the Fourth Proportional to 402,406.29, 603,702.72 and 118,085.31

Step by Step Solution

1. Step 1: Write the proportion equation
   402,406.29 : 603,702.72 = 118,085.31 : x
2. Step 2: Convert to fraction form
   402,406.29/603,702.72 = 118,085.31/x
3. Step 3: Cross multiply
   402,406.29x = 603,702.72 × 118,085.31
4. Step 4: Simplify right side
   402,406.29x = 71,288,422,839.04
5. Step 5: Solve for x
   x = 71,288,422,839.04/402,406.29
6. Step 6: Final answer
   x = 177,155.34