Finding the Fourth Proportional to 6,380.78, 8,805.67 and 3,863.35

Step by Step Solution

1. Step 1: Write the proportion equation
   6,380.78 : 8,805.67 = 3,863.35 : x
2. Step 2: Convert to fraction form
   6,380.78/8,805.67 = 3,863.35/x
3. Step 3: Cross multiply
   6,380.78x = 8,805.67 × 3,863.35
4. Step 4: Simplify right side
   6,380.78x = 34,019,365.88
5. Step 5: Solve for x
   x = 34,019,365.88/6,380.78
6. Step 6: Final answer
   x = 5,331.54