Finding the Fourth Proportional to 88,608.20, 122,381.42 and 64,516.89

Step by Step Solution

1. Step 1: Write the proportion equation
   88,608.20 : 122,381.42 = 64,516.89 : x
2. Step 2: Convert to fraction form
   88,608.20/122,381.42 = 64,516.89/x
3. Step 3: Cross multiply
   88,608.20x = 122,381.42 × 64,516.89
4. Step 4: Simplify right side
   88,608.20x = 7,895,668,289.60
5. Step 5: Solve for x
   x = 7,895,668,289.60/88,608.20
6. Step 6: Final answer
   x = 89,107.65