Finding the Fourth Proportional to 16,456.72, 22,710.72 and 9,384.88

Step by Step Solution

1. Step 1: Write the proportion equation
   16,456.72 : 22,710.72 = 9,384.88 : x
2. Step 2: Convert to fraction form
   16,456.72/22,710.72 = 9,384.88/x
3. Step 3: Cross multiply
   16,456.72x = 22,710.72 × 9,384.88
4. Step 4: Simplify right side
   16,456.72x = 213,137,381.91
5. Step 5: Solve for x
   x = 213,137,381.91/16,456.72
6. Step 6: Final answer
   x = 12,951.39