Finding the Fourth Proportional to 13,118.65, 18,103.82 and 7,150.30

Step by Step Solution

1. Step 1: Write the proportion equation
   13,118.65 : 18,103.82 = 7,150.30 : x
2. Step 2: Convert to fraction form
   13,118.65/18,103.82 = 7,150.30/x
3. Step 3: Cross multiply
   13,118.65x = 18,103.82 × 7,150.30
4. Step 4: Simplify right side
   13,118.65x = 129,447,744.15
5. Step 5: Solve for x
   x = 129,447,744.15/13,118.65
6. Step 6: Final answer
   x = 9,867.46