Finding the Fourth Proportional to 2,638.94, 3,641.76 and 1,443.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,638.94 : 3,641.76 = 1,443.90 : x
2. Step 2: Convert to fraction form
   2,638.94/3,641.76 = 1,443.90/x
3. Step 3: Cross multiply
   2,638.94x = 3,641.76 × 1,443.90
4. Step 4: Simplify right side
   2,638.94x = 5,258,330.04
5. Step 5: Solve for x
   x = 5,258,330.04/2,638.94
6. Step 6: Final answer
   x = 1,992.60