Finding the Fourth Proportional to 8,310.40, 12,458.31 and 3,384.18

Step by Step Solution

1. Step 1: Write the proportion equation
   8,310.40 : 12,458.31 = 3,384.18 : x
2. Step 2: Convert to fraction form
   8,310.40/12,458.31 = 3,384.18/x
3. Step 3: Cross multiply
   8,310.40x = 12,458.31 × 3,384.18
4. Step 4: Simplify right side
   8,310.40x = 42,161,150.85
5. Step 5: Solve for x
   x = 42,161,150.85/8,310.40
6. Step 6: Final answer
   x = 5,073.30