Finding the Fourth Proportional to 64,231.43, 88,580.70 and 55,153.89

Step by Step Solution

1. Step 1: Write the proportion equation
   64,231.43 : 88,580.70 = 55,153.89 : x
2. Step 2: Convert to fraction form
   64,231.43/88,580.70 = 55,153.89/x
3. Step 3: Cross multiply
   64,231.43x = 88,580.70 × 55,153.89
4. Step 4: Simplify right side
   64,231.43x = 4,885,570,183.92
5. Step 5: Solve for x
   x = 4,885,570,183.92/64,231.43
6. Step 6: Final answer
   x = 76,061.99