Finding the Fourth Proportional to 12,508.16, 17,259.57 and 7,131.29

Step by Step Solution

1. Step 1: Write the proportion equation
   12,508.16 : 17,259.57 = 7,131.29 : x
2. Step 2: Convert to fraction form
   12,508.16/17,259.57 = 7,131.29/x
3. Step 3: Cross multiply
   12,508.16x = 17,259.57 × 7,131.29
4. Step 4: Simplify right side
   12,508.16x = 123,082,998.95
5. Step 5: Solve for x
   x = 123,082,998.95/12,508.16
6. Step 6: Final answer
   x = 9,840.22