Finding the Fourth Proportional to 13,080.69, 18,055.31 and 8,891.37

Step by Step Solution

1. Step 1: Write the proportion equation
   13,080.69 : 18,055.31 = 8,891.37 : x
2. Step 2: Convert to fraction form
   13,080.69/18,055.31 = 8,891.37/x
3. Step 3: Cross multiply
   13,080.69x = 18,055.31 × 8,891.37
4. Step 4: Simplify right side
   13,080.69x = 160,536,397.22
5. Step 5: Solve for x
   x = 160,536,397.22/13,080.69
6. Step 6: Final answer
   x = 12,272.78