Finding the Fourth Proportional to 13,119.27, 18,104.06 and 7,150.81

Step by Step Solution

1. Step 1: Write the proportion equation
   13,119.27 : 18,104.06 = 7,150.81 : x
2. Step 2: Convert to fraction form
   13,119.27/18,104.06 = 7,150.81/x
3. Step 3: Cross multiply
   13,119.27x = 18,104.06 × 7,150.81
4. Step 4: Simplify right side
   13,119.27x = 129,458,693.29
5. Step 5: Solve for x
   x = 129,458,693.29/13,119.27
6. Step 6: Final answer
   x = 9,867.83