Finding the Fourth Proportional to 3,919.23, 5,408.51 and 2,150.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,919.23 : 5,408.51 = 2,150.82 : x
2. Step 2: Convert to fraction form
   3,919.23/5,408.51 = 2,150.82/x
3. Step 3: Cross multiply
   3,919.23x = 5,408.51 × 2,150.82
4. Step 4: Simplify right side
   3,919.23x = 11,632,720.72
5. Step 5: Solve for x
   x = 11,632,720.72/3,919.23
6. Step 6: Final answer
   x = 2,968.11