Finding the Fourth Proportional to 156,091.52, 215,406.88 and 88,109.12

Step by Step Solution

1. Step 1: Write the proportion equation
   156,091.52 : 215,406.88 = 88,109.12 : x
2. Step 2: Convert to fraction form
   156,091.52/215,406.88 = 88,109.12/x
3. Step 3: Cross multiply
   156,091.52x = 215,406.88 × 88,109.12
4. Step 4: Simplify right side
   156,091.52x = 18,979,310,638.75
5. Step 5: Solve for x
   x = 18,979,310,638.75/156,091.52
6. Step 6: Final answer
   x = 121,590.91