Finding the Fourth Proportional to 13,008.72, 17,952.08 and 7,040.39

Step by Step Solution

1. Step 1: Write the proportion equation
   13,008.72 : 17,952.08 = 7,040.39 : x
2. Step 2: Convert to fraction form
   13,008.72/17,952.08 = 7,040.39/x
3. Step 3: Cross multiply
   13,008.72x = 17,952.08 × 7,040.39
4. Step 4: Simplify right side
   13,008.72x = 126,389,559.15
5. Step 5: Solve for x
   x = 126,389,559.15/13,008.72
6. Step 6: Final answer
   x = 9,715.76