Finding the Fourth Proportional to 12,087.41, 18,136.69 and 5,515.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,087.41 : 18,136.69 = 5,515.61 : x
2. Step 2: Convert to fraction form
   12,087.41/18,136.69 = 5,515.61/x
3. Step 3: Cross multiply
   12,087.41x = 18,136.69 × 5,515.61
4. Step 4: Simplify right side
   12,087.41x = 100,034,804.26
5. Step 5: Solve for x
   x = 100,034,804.26/12,087.41
6. Step 6: Final answer
   x = 8,275.95