Finding the Fourth Proportional to 3,863.09, 5,789.55 and 2,108.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,863.09 : 5,789.55 = 2,108.86 : x
2. Step 2: Convert to fraction form
   3,863.09/5,789.55 = 2,108.86/x
3. Step 3: Cross multiply
   3,863.09x = 5,789.55 × 2,108.86
4. Step 4: Simplify right side
   3,863.09x = 12,209,350.41
5. Step 5: Solve for x
   x = 12,209,350.41/3,863.09
6. Step 6: Final answer
   x = 3,160.51