Finding the Fourth Proportional to 13,119.04, 18,104.20 and 7,150.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,119.04 : 18,104.20 = 7,150.72 : x
2. Step 2: Convert to fraction form
   13,119.04/18,104.20 = 7,150.72/x
3. Step 3: Cross multiply
   13,119.04x = 18,104.20 × 7,150.72
4. Step 4: Simplify right side
   13,119.04x = 129,458,065.02
5. Step 5: Solve for x
   x = 129,458,065.02/13,119.04
6. Step 6: Final answer
   x = 9,867.95