Finding the Fourth Proportional to 6,291.81, 8,686.04 and 3,934.71

Step by Step Solution

1. Step 1: Write the proportion equation
   6,291.81 : 8,686.04 = 3,934.71 : x
2. Step 2: Convert to fraction form
   6,291.81/8,686.04 = 3,934.71/x
3. Step 3: Cross multiply
   6,291.81x = 8,686.04 × 3,934.71
4. Step 4: Simplify right side
   6,291.81x = 34,177,028.77
5. Step 5: Solve for x
   x = 34,177,028.77/6,291.81
6. Step 6: Final answer
   x = 5,431.99