Finding the Fourth Proportional to 3,862.09, 5,788.05 and 2,107.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,862.09 : 5,788.05 = 2,107.86 : x
2. Step 2: Convert to fraction form
   3,862.09/5,788.05 = 2,107.86/x
3. Step 3: Cross multiply
   3,862.09x = 5,788.05 × 2,107.86
4. Step 4: Simplify right side
   3,862.09x = 12,200,399.07
5. Step 5: Solve for x
   x = 12,200,399.07/3,862.09
6. Step 6: Final answer
   x = 3,159.01