Finding the Fourth Proportional to 156,064.59, 215,368.25 and 88,103.61

Step by Step Solution

1. Step 1: Write the proportion equation
   156,064.59 : 215,368.25 = 88,103.61 : x
2. Step 2: Convert to fraction form
   156,064.59/215,368.25 = 88,103.61/x
3. Step 3: Cross multiply
   156,064.59x = 215,368.25 × 88,103.61
4. Step 4: Simplify right side
   156,064.59x = 18,974,719,863.86
5. Step 5: Solve for x
   x = 18,974,719,863.86/156,064.59
6. Step 6: Final answer
   x = 121,582.48