Finding the Fourth Proportional to 12,080.69, 18,118.29 and 5,508.75

Step by Step Solution

1. Step 1: Write the proportion equation
   12,080.69 : 18,118.29 = 5,508.75 : x
2. Step 2: Convert to fraction form
   12,080.69/18,118.29 = 5,508.75/x
3. Step 3: Cross multiply
   12,080.69x = 18,118.29 × 5,508.75
4. Step 4: Simplify right side
   12,080.69x = 99,809,130.04
5. Step 5: Solve for x
   x = 99,809,130.04/12,080.69
6. Step 6: Final answer
   x = 8,261.88