Finding the Fourth Proportional to 13,087.14, 18,066.15 and 8,613.24

Step by Step Solution

1. Step 1: Write the proportion equation
   13,087.14 : 18,066.15 = 8,613.24 : x
2. Step 2: Convert to fraction form
   13,087.14/18,066.15 = 8,613.24/x
3. Step 3: Cross multiply
   13,087.14x = 18,066.15 × 8,613.24
4. Step 4: Simplify right side
   13,087.14x = 155,608,085.83
5. Step 5: Solve for x
   x = 155,608,085.83/13,087.14
6. Step 6: Final answer
   x = 11,890.15