Finding the Fourth Proportional to 13,131.92, 18,198.72 and 12,882.71

Step by Step Solution

1. Step 1: Write the proportion equation
   13,131.92 : 18,198.72 = 12,882.71 : x
2. Step 2: Convert to fraction form
   13,131.92/18,198.72 = 12,882.71/x
3. Step 3: Cross multiply
   13,131.92x = 18,198.72 × 12,882.71
4. Step 4: Simplify right side
   13,131.92x = 234,448,841.40
5. Step 5: Solve for x
   x = 234,448,841.40/13,131.92
6. Step 6: Final answer
   x = 17,853.35