Finding the Fourth Proportional to 13,119.60, 18,105.29 and 7,151.52

Step by Step Solution

1. Step 1: Write the proportion equation
   13,119.60 : 18,105.29 = 7,151.52 : x
2. Step 2: Convert to fraction form
   13,119.60/18,105.29 = 7,151.52/x
3. Step 3: Cross multiply
   13,119.60x = 18,105.29 × 7,151.52
4. Step 4: Simplify right side
   13,119.60x = 129,480,402.50
5. Step 5: Solve for x
   x = 129,480,402.50/13,119.60
6. Step 6: Final answer
   x = 9,869.23