Finding the Fourth Proportional to 13,119.84, 18,105.02 and 7,151.63

Step by Step Solution

1. Step 1: Write the proportion equation
   13,119.84 : 18,105.02 = 7,151.63 : x
2. Step 2: Convert to fraction form
   13,119.84/18,105.02 = 7,151.63/x
3. Step 3: Cross multiply
   13,119.84x = 18,105.02 × 7,151.63
4. Step 4: Simplify right side
   13,119.84x = 129,480,304.72
5. Step 5: Solve for x
   x = 129,480,304.72/13,119.84
6. Step 6: Final answer
   x = 9,869.05