Finding the Fourth Proportional to 2,480.42, 3,721.60 and 1,092.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,480.42 : 3,721.60 = 1,092.78 : x
2. Step 2: Convert to fraction form
   2,480.42/3,721.60 = 1,092.78/x
3. Step 3: Cross multiply
   2,480.42x = 3,721.60 × 1,092.78
4. Step 4: Simplify right side
   2,480.42x = 4,066,902.08
5. Step 5: Solve for x
   x = 4,066,902.08/2,480.42
6. Step 6: Final answer
   x = 1,639.60