Finding the Fourth Proportional to 16,839.57, 23,238.75 and 9,286.17

Step by Step Solution

1. Step 1: Write the proportion equation
   16,839.57 : 23,238.75 = 9,286.17 : x
2. Step 2: Convert to fraction form
   16,839.57/23,238.75 = 9,286.17/x
3. Step 3: Cross multiply
   16,839.57x = 23,238.75 × 9,286.17
4. Step 4: Simplify right side
   16,839.57x = 215,798,983.09
5. Step 5: Solve for x
   x = 215,798,983.09/16,839.57
6. Step 6: Final answer
   x = 12,814.99