Finding the Fourth Proportional to 8,291.34, 12,436.98 and 3,906.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,291.34 : 12,436.98 = 3,906.42 : x
2. Step 2: Convert to fraction form
   8,291.34/12,436.98 = 3,906.42/x
3. Step 3: Cross multiply
   8,291.34x = 12,436.98 × 3,906.42
4. Step 4: Simplify right side
   8,291.34x = 48,584,067.41
5. Step 5: Solve for x
   x = 48,584,067.41/8,291.34
6. Step 6: Final answer
   x = 5,859.62