Finding the Fourth Proportional to 156,083.72, 215,405.29 and 88,112.21

Step by Step Solution

1. Step 1: Write the proportion equation
   156,083.72 : 215,405.29 = 88,112.21 : x
2. Step 2: Convert to fraction form
   156,083.72/215,405.29 = 88,112.21/x
3. Step 3: Cross multiply
   156,083.72x = 215,405.29 × 88,112.21
4. Step 4: Simplify right side
   156,083.72x = 18,979,835,168.52
5. Step 5: Solve for x
   x = 18,979,835,168.52/156,083.72
6. Step 6: Final answer
   x = 121,600.35