Finding the Fourth Proportional to 156,631.68, 216,162.40 and 88,648.72

Step by Step Solution

1. Step 1: Write the proportion equation
   156,631.68 : 216,162.40 = 88,648.72 : x
2. Step 2: Convert to fraction form
   156,631.68/216,162.40 = 88,648.72/x
3. Step 3: Cross multiply
   156,631.68x = 216,162.40 × 88,648.72
4. Step 4: Simplify right side
   156,631.68x = 19,162,520,072.13
5. Step 5: Solve for x
   x = 19,162,520,072.13/156,631.68
6. Step 6: Final answer
   x = 122,341.28