Finding the Fourth Proportional to 3,408.72, 5,109.63 and 1,327.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,408.72 : 5,109.63 = 1,327.42 : x
2. Step 2: Convert to fraction form
   3,408.72/5,109.63 = 1,327.42/x
3. Step 3: Cross multiply
   3,408.72x = 5,109.63 × 1,327.42
4. Step 4: Simplify right side
   3,408.72x = 6,782,625.05
5. Step 5: Solve for x
   x = 6,782,625.05/3,408.72
6. Step 6: Final answer
   x = 1,989.79