Finding the Fourth Proportional to 2,443.78, 3,372.38 and 1,381.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,443.78 : 3,372.38 = 1,381.53 : x
2. Step 2: Convert to fraction form
   2,443.78/3,372.38 = 1,381.53/x
3. Step 3: Cross multiply
   2,443.78x = 3,372.38 × 1,381.53
4. Step 4: Simplify right side
   2,443.78x = 4,659,028.80
5. Step 5: Solve for x
   x = 4,659,028.80/2,443.78
6. Step 6: Final answer
   x = 1,906.48