Finding the Fourth Proportional to 13,118.64, 18,103.26 and 7,150.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,118.64 : 18,103.26 = 7,150.18 : x
2. Step 2: Convert to fraction form
   13,118.64/18,103.26 = 7,150.18/x
3. Step 3: Cross multiply
   13,118.64x = 18,103.26 × 7,150.18
4. Step 4: Simplify right side
   13,118.64x = 129,441,567.59
5. Step 5: Solve for x
   x = 129,441,567.59/13,118.64
6. Step 6: Final answer
   x = 9,867.00