Finding the Fourth Proportional to 13,117.86, 18,103.10 and 7,150.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,117.86 : 18,103.10 = 7,150.10 : x
2. Step 2: Convert to fraction form
   13,117.86/18,103.10 = 7,150.10/x
3. Step 3: Cross multiply
   13,117.86x = 18,103.10 × 7,150.10
4. Step 4: Simplify right side
   13,117.86x = 129,438,849.04
5. Step 5: Solve for x
   x = 129,438,849.04/13,117.86
6. Step 6: Final answer
   x = 9,867.38