Finding the Fourth Proportional to 16,566.72, 22,861.40 and 9,491.78

Step by Step Solution

1. Step 1: Write the proportion equation
   16,566.72 : 22,861.40 = 9,491.78 : x
2. Step 2: Convert to fraction form
   16,566.72/22,861.40 = 9,491.78/x
3. Step 3: Cross multiply
   16,566.72x = 22,861.40 × 9,491.78
4. Step 4: Simplify right side
   16,566.72x = 216,995,217.53
5. Step 5: Solve for x
   x = 216,995,217.53/16,566.72
6. Step 6: Final answer
   x = 13,098.26