Finding the Fourth Proportional to 8,311.23, 12,470.90 and 3,384.27

Step by Step Solution

1. Step 1: Write the proportion equation
   8,311.23 : 12,470.90 = 3,384.27 : x
2. Step 2: Convert to fraction form
   8,311.23/12,470.90 = 3,384.27/x
3. Step 3: Cross multiply
   8,311.23x = 12,470.90 × 3,384.27
4. Step 4: Simplify right side
   8,311.23x = 42,204,875.82
5. Step 5: Solve for x
   x = 42,204,875.82/8,311.23
6. Step 6: Final answer
   x = 5,078.05