Finding the Fourth Proportional to 8,103.80, 12,158.58 and 3,490.04

Step by Step Solution

1. Step 1: Write the proportion equation
   8,103.80 : 12,158.58 = 3,490.04 : x
2. Step 2: Convert to fraction form
   8,103.80/12,158.58 = 3,490.04/x
3. Step 3: Cross multiply
   8,103.80x = 12,158.58 × 3,490.04
4. Step 4: Simplify right side
   8,103.80x = 42,433,930.54
5. Step 5: Solve for x
   x = 42,433,930.54/8,103.80
6. Step 6: Final answer
   x = 5,236.30