Finding the Fourth Proportional to 3,984.72, 5,967.60 and 3,408

Step by Step Solution

1. Step 1: Write the proportion equation
   3,984.72 : 5,967.60 = 3,408 : x
2. Step 2: Convert to fraction form
   3,984.72/5,967.60 = 3,408/x
3. Step 3: Cross multiply
   3,984.72x = 5,967.60 × 3,408
4. Step 4: Simplify right side
   3,984.72x = 20,337,580.80
5. Step 5: Solve for x
   x = 20,337,580.80/3,984.72
6. Step 6: Final answer
   x = 5,103.89