Finding the Fourth Proportional to 3,942.12, 5,919.90 and 3,777

Step by Step Solution

1. Step 1: Write the proportion equation
   3,942.12 : 5,919.90 = 3,777 : x
2. Step 2: Convert to fraction form
   3,942.12/5,919.90 = 3,777/x
3. Step 3: Cross multiply
   3,942.12x = 5,919.90 × 3,777
4. Step 4: Simplify right side
   3,942.12x = 22,359,462.30
5. Step 5: Solve for x
   x = 22,359,462.30/3,942.12
6. Step 6: Final answer
   x = 5,671.94