Finding the Fourth Proportional to 156,812.32, 216,385.39 and 88,815.72

Step by Step Solution

1. Step 1: Write the proportion equation
   156,812.32 : 216,385.39 = 88,815.72 : x
2. Step 2: Convert to fraction form
   156,812.32/216,385.39 = 88,815.72/x
3. Step 3: Cross multiply
   156,812.32x = 216,385.39 × 88,815.72
4. Step 4: Simplify right side
   156,812.32x = 19,218,424,210.33
5. Step 5: Solve for x
   x = 19,218,424,210.33/156,812.32
6. Step 6: Final answer
   x = 122,556.85