Finding the Fourth Proportional to 8,771.56, 12,099.72 and 5,579.08

Step by Step Solution

1. Step 1: Write the proportion equation
   8,771.56 : 12,099.72 = 5,579.08 : x
2. Step 2: Convert to fraction form
   8,771.56/12,099.72 = 5,579.08/x
3. Step 3: Cross multiply
   8,771.56x = 12,099.72 × 5,579.08
4. Step 4: Simplify right side
   8,771.56x = 67,505,305.86
5. Step 5: Solve for x
   x = 67,505,305.86/8,771.56
6. Step 6: Final answer
   x = 7,695.93