Finding the Fourth Proportional to 3,946.18, 5,469.25 and 3,872.37

Step by Step Solution

1. Step 1: Write the proportion equation
   3,946.18 : 5,469.25 = 3,872.37 : x
2. Step 2: Convert to fraction form
   3,946.18/5,469.25 = 3,872.37/x
3. Step 3: Cross multiply
   3,946.18x = 5,469.25 × 3,872.37
4. Step 4: Simplify right side
   3,946.18x = 21,178,949.94
5. Step 5: Solve for x
   x = 21,178,949.94/3,946.18
6. Step 6: Final answer
   x = 5,366.95