Finding the Fourth Proportional to 2,640.54, 3,960.78 and 1,472.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,640.54 : 3,960.78 = 1,472.29 : x
2. Step 2: Convert to fraction form
   2,640.54/3,960.78 = 1,472.29/x
3. Step 3: Cross multiply
   2,640.54x = 3,960.78 × 1,472.29
4. Step 4: Simplify right side
   2,640.54x = 5,831,416.79
5. Step 5: Solve for x
   x = 5,831,416.79/2,640.54
6. Step 6: Final answer
   x = 2,208.42