Finding the Fourth Proportional to 156,688.77, 216,243.89 and 88,717.72

Step by Step Solution

1. Step 1: Write the proportion equation
   156,688.77 : 216,243.89 = 88,717.72 : x
2. Step 2: Convert to fraction form
   156,688.77/216,243.89 = 88,717.72/x
3. Step 3: Cross multiply
   156,688.77x = 216,243.89 × 88,717.72
4. Step 4: Simplify right side
   156,688.77x = 19,184,664,884.73
5. Step 5: Solve for x
   x = 19,184,664,884.73/156,688.77
6. Step 6: Final answer
   x = 122,438.03