Finding the Fourth Proportional to 12,389.85, 17,078.31 and 9,732.69

Step by Step Solution

1. Step 1: Write the proportion equation
   12,389.85 : 17,078.31 = 9,732.69 : x
2. Step 2: Convert to fraction form
   12,389.85/17,078.31 = 9,732.69/x
3. Step 3: Cross multiply
   12,389.85x = 17,078.31 × 9,732.69
4. Step 4: Simplify right side
   12,389.85x = 166,217,896.95
5. Step 5: Solve for x
   x = 166,217,896.95/12,389.85
6. Step 6: Final answer
   x = 13,415.65