Finding the Fourth Proportional to 8,986.12, 12,399.38 and 5,007.22

Step by Step Solution

1. Step 1: Write the proportion equation
   8,986.12 : 12,399.38 = 5,007.22 : x
2. Step 2: Convert to fraction form
   8,986.12/12,399.38 = 5,007.22/x
3. Step 3: Cross multiply
   8,986.12x = 12,399.38 × 5,007.22
4. Step 4: Simplify right side
   8,986.12x = 62,086,423.52
5. Step 5: Solve for x
   x = 62,086,423.52/8,986.12
6. Step 6: Final answer
   x = 6,909.15