Finding the Fourth Proportional to 8,171.12, 12,251.40 and 3,494.18

Step by Step Solution

1. Step 1: Write the proportion equation
   8,171.12 : 12,251.40 = 3,494.18 : x
2. Step 2: Convert to fraction form
   8,171.12/12,251.40 = 3,494.18/x
3. Step 3: Cross multiply
   8,171.12x = 12,251.40 × 3,494.18
4. Step 4: Simplify right side
   8,171.12x = 42,808,535.60
5. Step 5: Solve for x
   x = 42,808,535.60/8,171.12
6. Step 6: Final answer
   x = 5,239.01