Finding the Fourth Proportional to 12,087.32, 18,113.42 and 8,584.17

Step by Step Solution

1. Step 1: Write the proportion equation
   12,087.32 : 18,113.42 = 8,584.17 : x
2. Step 2: Convert to fraction form
   12,087.32/18,113.42 = 8,584.17/x
3. Step 3: Cross multiply
   12,087.32x = 18,113.42 × 8,584.17
4. Step 4: Simplify right side
   12,087.32x = 155,488,633.64
5. Step 5: Solve for x
   x = 155,488,633.64/12,087.32
6. Step 6: Final answer
   x = 12,863.79