Finding the Fourth Proportional to 13,489.98, 18,617.56 and 8,114.15

Step by Step Solution

1. Step 1: Write the proportion equation
   13,489.98 : 18,617.56 = 8,114.15 : x
2. Step 2: Convert to fraction form
   13,489.98/18,617.56 = 8,114.15/x
3. Step 3: Cross multiply
   13,489.98x = 18,617.56 × 8,114.15
4. Step 4: Simplify right side
   13,489.98x = 151,065,561.10
5. Step 5: Solve for x
   x = 151,065,561.10/13,489.98
6. Step 6: Final answer
   x = 11,198.35