Finding the Fourth Proportional to 156,009.91, 215,225.31 and 91,446.42

Step by Step Solution

1. Step 1: Write the proportion equation
   156,009.91 : 215,225.31 = 91,446.42 : x
2. Step 2: Convert to fraction form
   156,009.91/215,225.31 = 91,446.42/x
3. Step 3: Cross multiply
   156,009.91x = 215,225.31 × 91,446.42
4. Step 4: Simplify right side
   156,009.91x = 19,681,584,092.89
5. Step 5: Solve for x
   x = 19,681,584,092.89/156,009.91
6. Step 6: Final answer
   x = 126,155.99