Finding the Fourth Proportional to 8,139.38, 12,200.56 and 3,759.71

Step by Step Solution

1. Step 1: Write the proportion equation
   8,139.38 : 12,200.56 = 3,759.71 : x
2. Step 2: Convert to fraction form
   8,139.38/12,200.56 = 3,759.71/x
3. Step 3: Cross multiply
   8,139.38x = 12,200.56 × 3,759.71
4. Step 4: Simplify right side
   8,139.38x = 45,870,497.04
5. Step 5: Solve for x
   x = 45,870,497.04/8,139.38
6. Step 6: Final answer
   x = 5,635.63