Finding the Fourth Proportional to 59,792.28, 81,915.83 and 57,550.20

Step by Step Solution

1. Step 1: Write the proportion equation
   59,792.28 : 81,915.83 = 57,550.20 : x
2. Step 2: Convert to fraction form
   59,792.28/81,915.83 = 57,550.20/x
3. Step 3: Cross multiply
   59,792.28x = 81,915.83 × 57,550.20
4. Step 4: Simplify right side
   59,792.28x = 4,714,272,111.92
5. Step 5: Solve for x
   x = 4,714,272,111.92/59,792.28
6. Step 6: Final answer
   x = 78,844.16