Finding the Fourth Proportional to 13,146.35, 18,141.82 and 8,108.55

Step by Step Solution

1. Step 1: Write the proportion equation
   13,146.35 : 18,141.82 = 8,108.55 : x
2. Step 2: Convert to fraction form
   13,146.35/18,141.82 = 8,108.55/x
3. Step 3: Cross multiply
   13,146.35x = 18,141.82 × 8,108.55
4. Step 4: Simplify right side
   13,146.35x = 147,103,834.29
5. Step 5: Solve for x
   x = 147,103,834.29/13,146.35
6. Step 6: Final answer
   x = 11,189.71