Finding the Fourth Proportional to 156,064.10, 233,700.15 and 85,864.10

Step by Step Solution

1. Step 1: Write the proportion equation
   156,064.10 : 233,700.15 = 85,864.10 : x
2. Step 2: Convert to fraction form
   156,064.10/233,700.15 = 85,864.10/x
3. Step 3: Cross multiply
   156,064.10x = 233,700.15 × 85,864.10
4. Step 4: Simplify right side
   156,064.10x = 20,066,453,049.62
5. Step 5: Solve for x
   x = 20,066,453,049.62/156,064.10
6. Step 6: Final answer
   x = 128,578.28