Finding the Fourth Proportional to 12,581.85, 17,363.64 and 7,131.09

Step by Step Solution

1. Step 1: Write the proportion equation
   12,581.85 : 17,363.64 = 7,131.09 : x
2. Step 2: Convert to fraction form
   12,581.85/17,363.64 = 7,131.09/x
3. Step 3: Cross multiply
   12,581.85x = 17,363.64 × 7,131.09
4. Step 4: Simplify right side
   12,581.85x = 123,821,679.57
5. Step 5: Solve for x
   x = 123,821,679.57/12,581.85
6. Step 6: Final answer
   x = 9,841.29