Finding the Fourth Proportional to 13,144.13, 18,138.77 and 8,106.34

Step by Step Solution

1. Step 1: Write the proportion equation
   13,144.13 : 18,138.77 = 8,106.34 : x
2. Step 2: Convert to fraction form
   13,144.13/18,138.77 = 8,106.34/x
3. Step 3: Cross multiply
   13,144.13x = 18,138.77 × 8,106.34
4. Step 4: Simplify right side
   13,144.13x = 147,039,011.72
5. Step 5: Solve for x
   x = 147,039,011.72/13,144.13
6. Step 6: Final answer
   x = 11,186.67