Finding the Fourth Proportional to 402,150.71, 603,328.17 and 186,165.15

Step by Step Solution

1. Step 1: Write the proportion equation
   402,150.71 : 603,328.17 = 186,165.15 : x
2. Step 2: Convert to fraction form
   402,150.71/603,328.17 = 186,165.15/x
3. Step 3: Cross multiply
   402,150.71x = 603,328.17 × 186,165.15
4. Step 4: Simplify right side
   402,150.71x = 112,318,680,573.05
5. Step 5: Solve for x
   x = 112,318,680,573.05/402,150.71
6. Step 6: Final answer
   x = 279,295.00