Finding the Fourth Proportional to 156,061.10, 233,695.65 and 85,861.10

Step by Step Solution

1. Step 1: Write the proportion equation
   156,061.10 : 233,695.65 = 85,861.10 : x
2. Step 2: Convert to fraction form
   156,061.10/233,695.65 = 85,861.10/x
3. Step 3: Cross multiply
   156,061.10x = 233,695.65 × 85,861.10
4. Step 4: Simplify right side
   156,061.10x = 20,065,365,574.22
5. Step 5: Solve for x
   x = 20,065,365,574.22/156,061.10
6. Step 6: Final answer
   x = 128,573.78