Finding the Fourth Proportional to 3,919.16, 5,408.58 and 2,150.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,919.16 : 5,408.58 = 2,150.82 : x
2. Step 2: Convert to fraction form
   3,919.16/5,408.58 = 2,150.82/x
3. Step 3: Cross multiply
   3,919.16x = 5,408.58 × 2,150.82
4. Step 4: Simplify right side
   3,919.16x = 11,632,882.04
5. Step 5: Solve for x
   x = 11,632,882.04/3,919.16
6. Step 6: Final answer
   x = 2,968.21