Finding the Fourth Proportional to 13,144.11, 18,145.37 and 8,111.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,144.11 : 18,145.37 = 8,111.10 : x
2. Step 2: Convert to fraction form
   13,144.11/18,145.37 = 8,111.10/x
3. Step 3: Cross multiply
   13,144.11x = 18,145.37 × 8,111.10
4. Step 4: Simplify right side
   13,144.11x = 147,178,910.61
5. Step 5: Solve for x
   x = 147,178,910.61/13,144.11
6. Step 6: Final answer
   x = 11,197.33