Finding the Fourth Proportional to 16,515.50, 22,784.90 and 9,438.12

Step by Step Solution

1. Step 1: Write the proportion equation
   16,515.50 : 22,784.90 = 9,438.12 : x
2. Step 2: Convert to fraction form
   16,515.50/22,784.90 = 9,438.12/x
3. Step 3: Cross multiply
   16,515.50x = 22,784.90 × 9,438.12
4. Step 4: Simplify right side
   16,515.50x = 215,046,573.20
5. Step 5: Solve for x
   x = 215,046,573.20/16,515.50
6. Step 6: Final answer
   x = 13,020.90