Finding the Fourth Proportional to 156,112.72, 215,438.92 and 88,116.72

Step by Step Solution

1. Step 1: Write the proportion equation
   156,112.72 : 215,438.92 = 88,116.72 : x
2. Step 2: Convert to fraction form
   156,112.72/215,438.92 = 88,116.72/x
3. Step 3: Cross multiply
   156,112.72x = 215,438.92 × 88,116.72
4. Step 4: Simplify right side
   156,112.72x = 18,983,770,990.74
5. Step 5: Solve for x
   x = 18,983,770,990.74/156,112.72
6. Step 6: Final answer
   x = 121,602.97