Finding the Fourth Proportional to 14,116.55, 21,185.42 and 9,663.57

Step by Step Solution

1. Step 1: Write the proportion equation
   14,116.55 : 21,185.42 = 9,663.57 : x
2. Step 2: Convert to fraction form
   14,116.55/21,185.42 = 9,663.57/x
3. Step 3: Cross multiply
   14,116.55x = 21,185.42 × 9,663.57
4. Step 4: Simplify right side
   14,116.55x = 204,726,740.83
5. Step 5: Solve for x
   x = 204,726,740.83/14,116.55
6. Step 6: Final answer
   x = 14,502.61