Finding the Fourth Proportional to 156,658.38, 216,182.79 and 85,036.83

Step by Step Solution

1. Step 1: Write the proportion equation
   156,658.38 : 216,182.79 = 85,036.83 : x
2. Step 2: Convert to fraction form
   156,658.38/216,182.79 = 85,036.83/x
3. Step 3: Cross multiply
   156,658.38x = 216,182.79 × 85,036.83
4. Step 4: Simplify right side
   156,658.38x = 18,383,499,162.16
5. Step 5: Solve for x
   x = 18,383,499,162.16/156,658.38
6. Step 6: Final answer
   x = 117,347.69