Finding the Fourth Proportional to 13,008.51, 17,951.79 and 7,040.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,008.51 : 17,951.79 = 7,040.18 : x
2. Step 2: Convert to fraction form
   13,008.51/17,951.79 = 7,040.18/x
3. Step 3: Cross multiply
   13,008.51x = 17,951.79 × 7,040.18
4. Step 4: Simplify right side
   13,008.51x = 126,383,743.16
5. Step 5: Solve for x
   x = 126,383,743.16/13,008.51
6. Step 6: Final answer
   x = 9,715.47