Finding the Fourth Proportional to 13,119.69, 18,105.08 and 7,151.34

Step by Step Solution

1. Step 1: Write the proportion equation
   13,119.69 : 18,105.08 = 7,151.34 : x
2. Step 2: Convert to fraction form
   13,119.69/18,105.08 = 7,151.34/x
3. Step 3: Cross multiply
   13,119.69x = 18,105.08 × 7,151.34
4. Step 4: Simplify right side
   13,119.69x = 129,475,547.05
5. Step 5: Solve for x
   x = 129,475,547.05/13,119.69
6. Step 6: Final answer
   x = 9,868.80