Finding the Fourth Proportional to 59,112.96, 81,585.12 and 57,168.96

Step by Step Solution

1. Step 1: Write the proportion equation
   59,112.96 : 81,585.12 = 57,168.96 : x
2. Step 2: Convert to fraction form
   59,112.96/81,585.12 = 57,168.96/x
3. Step 3: Cross multiply
   59,112.96x = 81,585.12 × 57,168.96
4. Step 4: Simplify right side
   59,112.96x = 4,664,136,461.88
5. Step 5: Solve for x
   x = 4,664,136,461.88/59,112.96
6. Step 6: Final answer
   x = 78,902.10