Finding the Fourth Proportional to 16,287.52, 22,474.37 and 9,213.78

Step by Step Solution

1. Step 1: Write the proportion equation
   16,287.52 : 22,474.37 = 9,213.78 : x
2. Step 2: Convert to fraction form
   16,287.52/22,474.37 = 9,213.78/x
3. Step 3: Cross multiply
   16,287.52x = 22,474.37 × 9,213.78
4. Step 4: Simplify right side
   16,287.52x = 207,073,900.82
5. Step 5: Solve for x
   x = 207,073,900.82/16,287.52
6. Step 6: Final answer
   x = 12,713.65