Finding the Fourth Proportional to 13,079.18, 18,049.42 and 7,110.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,079.18 : 18,049.42 = 7,110.72 : x
2. Step 2: Convert to fraction form
   13,079.18/18,049.42 = 7,110.72/x
3. Step 3: Cross multiply
   13,079.18x = 18,049.42 × 7,110.72
4. Step 4: Simplify right side
   13,079.18x = 128,344,371.78
5. Step 5: Solve for x
   x = 128,344,371.78/13,079.18
6. Step 6: Final answer
   x = 9,812.88