Finding the Fourth Proportional to 3,919.01, 5,408.22 and 2,150.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,919.01 : 5,408.22 = 2,150.57 : x
2. Step 2: Convert to fraction form
   3,919.01/5,408.22 = 2,150.57/x
3. Step 3: Cross multiply
   3,919.01x = 5,408.22 × 2,150.57
4. Step 4: Simplify right side
   3,919.01x = 11,630,755.69
5. Step 5: Solve for x
   x = 11,630,755.69/3,919.01
6. Step 6: Final answer
   x = 2,967.78