Finding the Fourth Proportional to 156,832.16, 216,428.72 and 85,212.27

Step by Step Solution

1. Step 1: Write the proportion equation
   156,832.16 : 216,428.72 = 85,212.27 : x
2. Step 2: Convert to fraction form
   156,832.16/216,428.72 = 85,212.27/x
3. Step 3: Cross multiply
   156,832.16x = 216,428.72 × 85,212.27
4. Step 4: Simplify right side
   156,832.16x = 18,442,382,098.33
5. Step 5: Solve for x
   x = 18,442,382,098.33/156,832.16
6. Step 6: Final answer
   x = 117,593.12