Finding the Fourth Proportional to 8,772.56, 12,101.10 and 5,580.08

Step by Step Solution

1. Step 1: Write the proportion equation
   8,772.56 : 12,101.10 = 5,580.08 : x
2. Step 2: Convert to fraction form
   8,772.56/12,101.10 = 5,580.08/x
3. Step 3: Cross multiply
   8,772.56x = 12,101.10 × 5,580.08
4. Step 4: Simplify right side
   8,772.56x = 67,525,106.09
5. Step 5: Solve for x
   x = 67,525,106.09/8,772.56
6. Step 6: Final answer
   x = 7,697.31