Finding the Fourth Proportional to 3,906.42, 5,856.99 and 2,055.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,906.42 : 5,856.99 = 2,055.57 : x
2. Step 2: Convert to fraction form
   3,906.42/5,856.99 = 2,055.57/x
3. Step 3: Cross multiply
   3,906.42x = 5,856.99 × 2,055.57
4. Step 4: Simplify right side
   3,906.42x = 12,039,452.93
5. Step 5: Solve for x
   x = 12,039,452.93/3,906.42
6. Step 6: Final answer
   x = 3,081.97