Finding the Fourth Proportional to 59,448.56, 88,641.34 and 57,815.60

Step by Step Solution

1. Step 1: Write the proportion equation
   59,448.56 : 88,641.34 = 57,815.60 : x
2. Step 2: Convert to fraction form
   59,448.56/88,641.34 = 57,815.60/x
3. Step 3: Cross multiply
   59,448.56x = 88,641.34 × 57,815.60
4. Step 4: Simplify right side
   59,448.56x = 5,124,852,256.90
5. Step 5: Solve for x
   x = 5,124,852,256.90/59,448.56
6. Step 6: Final answer
   x = 86,206.50