Finding the Fourth Proportional to 8,311.80, 12,456.94 and 3,375.71

Step by Step Solution

1. Step 1: Write the proportion equation
   8,311.80 : 12,456.94 = 3,375.71 : x
2. Step 2: Convert to fraction form
   8,311.80/12,456.94 = 3,375.71/x
3. Step 3: Cross multiply
   8,311.80x = 12,456.94 × 3,375.71
4. Step 4: Simplify right side
   8,311.80x = 42,050,999.25
5. Step 5: Solve for x
   x = 42,050,999.25/8,311.80
6. Step 6: Final answer
   x = 5,059.19