Finding the Fourth Proportional to 59,005.20, 88,680.60 and 57,968.40

Step by Step Solution

1. Step 1: Write the proportion equation
   59,005.20 : 88,680.60 = 57,968.40 : x
2. Step 2: Convert to fraction form
   59,005.20/88,680.60 = 57,968.40/x
3. Step 3: Cross multiply
   59,005.20x = 88,680.60 × 57,968.40
4. Step 4: Simplify right side
   59,005.20x = 5,140,672,493.04
5. Step 5: Solve for x
   x = 5,140,672,493.04/59,005.20
6. Step 6: Final answer
   x = 87,122.36