Finding the Fourth Proportional to 8,863.59, 13,288.77 and 3,865

Step by Step Solution

1. Step 1: Write the proportion equation
   8,863.59 : 13,288.77 = 3,865 : x
2. Step 2: Convert to fraction form
   8,863.59/13,288.77 = 3,865/x
3. Step 3: Cross multiply
   8,863.59x = 13,288.77 × 3,865
4. Step 4: Simplify right side
   8,863.59x = 51,361,096.05
5. Step 5: Solve for x
   x = 51,361,096.05/8,863.59
6. Step 6: Final answer
   x = 5,794.62