Finding the Fourth Proportional to 3,919.34, 5,408.69 and 2,151.04

Step by Step Solution

1. Step 1: Write the proportion equation
   3,919.34 : 5,408.69 = 2,151.04 : x
2. Step 2: Convert to fraction form
   3,919.34/5,408.69 = 2,151.04/x
3. Step 3: Cross multiply
   3,919.34x = 5,408.69 × 2,151.04
4. Step 4: Simplify right side
   3,919.34x = 11,634,297.78
5. Step 5: Solve for x
   x = 11,634,297.78/3,919.34
6. Step 6: Final answer
   x = 2,968.44