Finding the Fourth Proportional to 12,262.59, 18,387.17 and 5,685.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,262.59 : 18,387.17 = 5,685.15 : x
2. Step 2: Convert to fraction form
   12,262.59/18,387.17 = 5,685.15/x
3. Step 3: Cross multiply
   12,262.59x = 18,387.17 × 5,685.15
4. Step 4: Simplify right side
   12,262.59x = 104,533,791.10
5. Step 5: Solve for x
   x = 104,533,791.10/12,262.59
6. Step 6: Final answer
   x = 8,524.61