Finding the Fourth Proportional to 16,580.56, 22,872.42 and 9,861.40

Step by Step Solution

1. Step 1: Write the proportion equation
   16,580.56 : 22,872.42 = 9,861.40 : x
2. Step 2: Convert to fraction form
   16,580.56/22,872.42 = 9,861.40/x
3. Step 3: Cross multiply
   16,580.56x = 22,872.42 × 9,861.40
4. Step 4: Simplify right side
   16,580.56x = 225,554,082.59
5. Step 5: Solve for x
   x = 225,554,082.59/16,580.56
6. Step 6: Final answer
   x = 13,603.53