Finding the Fourth Proportional to 16,839.72, 23,239.32 and 9,286.56

Step by Step Solution

1. Step 1: Write the proportion equation
   16,839.72 : 23,239.32 = 9,286.56 : x
2. Step 2: Convert to fraction form
   16,839.72/23,239.32 = 9,286.56/x
3. Step 3: Cross multiply
   16,839.72x = 23,239.32 × 9,286.56
4. Step 4: Simplify right side
   16,839.72x = 215,813,339.54
5. Step 5: Solve for x
   x = 215,813,339.54/16,839.72
6. Step 6: Final answer
   x = 12,815.73