Finding the Fourth Proportional to 2,443.60, 3,371.80 and 1,381.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,443.60 : 3,371.80 = 1,381.40 : x
2. Step 2: Convert to fraction form
   2,443.60/3,371.80 = 1,381.40/x
3. Step 3: Cross multiply
   2,443.60x = 3,371.80 × 1,381.40
4. Step 4: Simplify right side
   2,443.60x = 4,657,804.52
5. Step 5: Solve for x
   x = 4,657,804.52/2,443.60
6. Step 6: Final answer
   x = 1,906.12