Finding the Fourth Proportional to 8,215.62, 12,323.49 and 3,286.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,215.62 : 12,323.49 = 3,286.50 : x
2. Step 2: Convert to fraction form
   8,215.62/12,323.49 = 3,286.50/x
3. Step 3: Cross multiply
   8,215.62x = 12,323.49 × 3,286.50
4. Step 4: Simplify right side
   8,215.62x = 40,501,149.89
5. Step 5: Solve for x
   x = 40,501,149.89/8,215.62
6. Step 6: Final answer
   x = 4,929.77