Finding the Fourth Proportional to 16,839.80, 23,238.89 and 9,286.25

Step by Step Solution

1. Step 1: Write the proportion equation
   16,839.80 : 23,238.89 = 9,286.25 : x
2. Step 2: Convert to fraction form
   16,839.80/23,238.89 = 9,286.25/x
3. Step 3: Cross multiply
   16,839.80x = 23,238.89 × 9,286.25
4. Step 4: Simplify right side
   16,839.80x = 215,802,014.46
5. Step 5: Solve for x
   x = 215,802,014.46/16,839.80
6. Step 6: Final answer
   x = 12,815.00