Finding the Fourth Proportional to 8,580.43, 12,861.72 and 4,411.16

Step by Step Solution

1. Step 1: Write the proportion equation
   8,580.43 : 12,861.72 = 4,411.16 : x
2. Step 2: Convert to fraction form
   8,580.43/12,861.72 = 4,411.16/x
3. Step 3: Cross multiply
   8,580.43x = 12,861.72 × 4,411.16
4. Step 4: Simplify right side
   8,580.43x = 56,735,088.72
5. Step 5: Solve for x
   x = 56,735,088.72/8,580.43
6. Step 6: Final answer
   x = 6,612.15