Finding the Fourth Proportional to 3,862.96, 5,790.86 and 2,105.36

Step by Step Solution

1. Step 1: Write the proportion equation
   3,862.96 : 5,790.86 = 2,105.36 : x
2. Step 2: Convert to fraction form
   3,862.96/5,790.86 = 2,105.36/x
3. Step 3: Cross multiply
   3,862.96x = 5,790.86 × 2,105.36
4. Step 4: Simplify right side
   3,862.96x = 12,191,845.01
5. Step 5: Solve for x
   x = 12,191,845.01/3,862.96
6. Step 6: Final answer
   x = 3,156.09