Finding the Fourth Proportional to 2,638.85, 3,641.50 and 1,443.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,638.85 : 3,641.50 = 1,443.81 : x
2. Step 2: Convert to fraction form
   2,638.85/3,641.50 = 1,443.81/x
3. Step 3: Cross multiply
   2,638.85x = 3,641.50 × 1,443.81
4. Step 4: Simplify right side
   2,638.85x = 5,257,630.51
5. Step 5: Solve for x
   x = 5,257,630.51/2,638.85
6. Step 6: Final answer
   x = 1,992.39