Finding the Fourth Proportional to 284,185.71, 392,176.31 and 156,861.34

Step by Step Solution

1. Step 1: Write the proportion equation
   284,185.71 : 392,176.31 = 156,861.34 : x
2. Step 2: Convert to fraction form
   284,185.71/392,176.31 = 156,861.34/x
3. Step 3: Cross multiply
   284,185.71x = 392,176.31 × 156,861.34
4. Step 4: Simplify right side
   284,185.71x = 61,517,301,502.86
5. Step 5: Solve for x
   x = 61,517,301,502.86/284,185.71
6. Step 6: Final answer
   x = 216,468.67