Finding the Fourth Proportional to 8,760.56, 13,139.42 and 2,520.32

Step by Step Solution

1. Step 1: Write the proportion equation
   8,760.56 : 13,139.42 = 2,520.32 : x
2. Step 2: Convert to fraction form
   8,760.56/13,139.42 = 2,520.32/x
3. Step 3: Cross multiply
   8,760.56x = 13,139.42 × 2,520.32
4. Step 4: Simplify right side
   8,760.56x = 33,115,464.72
5. Step 5: Solve for x
   x = 33,115,464.72/8,760.56
6. Step 6: Final answer
   x = 3,780.06