Finding the Fourth Proportional to 3,874.38, 5,360.71 and 3,378.05

Step by Step Solution

1. Step 1: Write the proportion equation
   3,874.38 : 5,360.71 = 3,378.05 : x
2. Step 2: Convert to fraction form
   3,874.38/5,360.71 = 3,378.05/x
3. Step 3: Cross multiply
   3,874.38x = 5,360.71 × 3,378.05
4. Step 4: Simplify right side
   3,874.38x = 18,108,746.42
5. Step 5: Solve for x
   x = 18,108,746.42/3,874.38
6. Step 6: Final answer
   x = 4,673.97