Finding the Fourth Proportional to 22,142.64, 30,565.37 and 16,221.34

Step by Step Solution

1. Step 1: Write the proportion equation
   22,142.64 : 30,565.37 = 16,221.34 : x
2. Step 2: Convert to fraction form
   22,142.64/30,565.37 = 16,221.34/x
3. Step 3: Cross multiply
   22,142.64x = 30,565.37 × 16,221.34
4. Step 4: Simplify right side
   22,142.64x = 495,811,223.14
5. Step 5: Solve for x
   x = 495,811,223.14/22,142.64
6. Step 6: Final answer
   x = 22,391.69