Finding the Fourth Proportional to 156,089.74, 215,404.39 and 84,469.75

Step by Step Solution

1. Step 1: Write the proportion equation
   156,089.74 : 215,404.39 = 84,469.75 : x
2. Step 2: Convert to fraction form
   156,089.74/215,404.39 = 84,469.75/x
3. Step 3: Cross multiply
   156,089.74x = 215,404.39 × 84,469.75
4. Step 4: Simplify right side
   156,089.74x = 18,195,153,472.83
5. Step 5: Solve for x
   x = 18,195,153,472.83/156,089.74
6. Step 6: Final answer
   x = 116,568.54