Finding the Fourth Proportional to 2,638.69, 3,641.40 and 1,443.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,638.69 : 3,641.40 = 1,443.69 : x
2. Step 2: Convert to fraction form
   2,638.69/3,641.40 = 1,443.69/x
3. Step 3: Cross multiply
   2,638.69x = 3,641.40 × 1,443.69
4. Step 4: Simplify right side
   2,638.69x = 5,257,052.77
5. Step 5: Solve for x
   x = 5,257,052.77/2,638.69
6. Step 6: Final answer
   x = 1,992.30