Finding the Fourth Proportional to 22,989.72, 31,715.10 and 14,487.96

Step by Step Solution

1. Step 1: Write the proportion equation
   22,989.72 : 31,715.10 = 14,487.96 : x
2. Step 2: Convert to fraction form
   22,989.72/31,715.10 = 14,487.96/x
3. Step 3: Cross multiply
   22,989.72x = 31,715.10 × 14,487.96
4. Step 4: Simplify right side
   22,989.72x = 459,487,100.20
5. Step 5: Solve for x
   x = 459,487,100.20/22,989.72
6. Step 6: Final answer
   x = 19,986.63