Finding the Fourth Proportional to 12,758.31, 17,605.76 and 7,169.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,758.31 : 17,605.76 = 7,169.31 : x
2. Step 2: Convert to fraction form
   12,758.31/17,605.76 = 7,169.31/x
3. Step 3: Cross multiply
   12,758.31x = 17,605.76 × 7,169.31
4. Step 4: Simplify right side
   12,758.31x = 126,221,115.38
5. Step 5: Solve for x
   x = 126,221,115.38/12,758.31
6. Step 6: Final answer
   x = 9,893.25