Finding the Fourth Proportional to 3,919.27, 5,408.56 and 2,150.77

Step by Step Solution

1. Step 1: Write the proportion equation
   3,919.27 : 5,408.56 = 2,150.77 : x
2. Step 2: Convert to fraction form
   3,919.27/5,408.56 = 2,150.77/x
3. Step 3: Cross multiply
   3,919.27x = 5,408.56 × 2,150.77
4. Step 4: Simplify right side
   3,919.27x = 11,632,568.59
5. Step 5: Solve for x
   x = 11,632,568.59/3,919.27
6. Step 6: Final answer
   x = 2,968.04