Finding the Fourth Proportional to 13,118.89, 18,104.16 and 7,150.54

Step by Step Solution

1. Step 1: Write the proportion equation
   13,118.89 : 18,104.16 = 7,150.54 : x
2. Step 2: Convert to fraction form
   13,118.89/18,104.16 = 7,150.54/x
3. Step 3: Cross multiply
   13,118.89x = 18,104.16 × 7,150.54
4. Step 4: Simplify right side
   13,118.89x = 129,454,520.25
5. Step 5: Solve for x
   x = 129,454,520.25/13,118.89
6. Step 6: Final answer
   x = 9,867.80