Finding the Fourth Proportional to 12,517.40, 17,272.34 and 7,140.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,517.40 : 17,272.34 = 7,140.56 : x
2. Step 2: Convert to fraction form
   12,517.40/17,272.34 = 7,140.56/x
3. Step 3: Cross multiply
   12,517.40x = 17,272.34 × 7,140.56
4. Step 4: Simplify right side
   12,517.40x = 123,334,180.11
5. Step 5: Solve for x
   x = 123,334,180.11/12,517.40
6. Step 6: Final answer
   x = 9,853.02