Finding the Fourth Proportional to 3,919.35, 5,408.72 and 2,150.92

Step by Step Solution

1. Step 1: Write the proportion equation
   3,919.35 : 5,408.72 = 2,150.92 : x
2. Step 2: Convert to fraction form
   3,919.35/5,408.72 = 2,150.92/x
3. Step 3: Cross multiply
   3,919.35x = 5,408.72 × 2,150.92
4. Step 4: Simplify right side
   3,919.35x = 11,633,724.02
5. Step 5: Solve for x
   x = 11,633,724.02/3,919.35
6. Step 6: Final answer
   x = 2,968.28