Finding the Fourth Proportional to 16,839.32, 23,238.09 and 9,286.47

Step by Step Solution

1. Step 1: Write the proportion equation
   16,839.32 : 23,238.09 = 9,286.47 : x
2. Step 2: Convert to fraction form
   16,839.32/23,238.09 = 9,286.47/x
3. Step 3: Cross multiply
   16,839.32x = 23,238.09 × 9,286.47
4. Step 4: Simplify right side
   16,839.32x = 215,799,825.64
5. Step 5: Solve for x
   x = 215,799,825.64/16,839.32
6. Step 6: Final answer
   x = 12,815.24