Finding the Fourth Proportional to 12,271.35, 18,408.76 and 3,949.43

Step by Step Solution

1. Step 1: Write the proportion equation
   12,271.35 : 18,408.76 = 3,949.43 : x
2. Step 2: Convert to fraction form
   12,271.35/18,408.76 = 3,949.43/x
3. Step 3: Cross multiply
   12,271.35x = 18,408.76 × 3,949.43
4. Step 4: Simplify right side
   12,271.35x = 72,704,109.01
5. Step 5: Solve for x
   x = 72,704,109.01/12,271.35
6. Step 6: Final answer
   x = 5,924.70