Finding the Fourth Proportional to 3,919.55, 5,408.58 and 2,426.91

Step by Step Solution

1. Step 1: Write the proportion equation
   3,919.55 : 5,408.58 = 2,426.91 : x
2. Step 2: Convert to fraction form
   3,919.55/5,408.58 = 2,426.91/x
3. Step 3: Cross multiply
   3,919.55x = 5,408.58 × 2,426.91
4. Step 4: Simplify right side
   3,919.55x = 13,126,136.89
5. Step 5: Solve for x
   x = 13,126,136.89/3,919.55
6. Step 6: Final answer
   x = 3,348.89