Finding the Fourth Proportional to 13,008.72, 17,951.94 and 7,040.24

Step by Step Solution

1. Step 1: Write the proportion equation
   13,008.72 : 17,951.94 = 7,040.24 : x
2. Step 2: Convert to fraction form
   13,008.72/17,951.94 = 7,040.24/x
3. Step 3: Cross multiply
   13,008.72x = 17,951.94 × 7,040.24
4. Step 4: Simplify right side
   13,008.72x = 126,385,876.31
5. Step 5: Solve for x
   x = 126,385,876.31/13,008.72
6. Step 6: Final answer
   x = 9,715.47