Finding the Fourth Proportional to 2,638.79, 3,641.52 and 1,443.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,638.79 : 3,641.52 = 1,443.78 : x
2. Step 2: Convert to fraction form
   2,638.79/3,641.52 = 1,443.78/x
3. Step 3: Cross multiply
   2,638.79x = 3,641.52 × 1,443.78
4. Step 4: Simplify right side
   2,638.79x = 5,257,553.75
5. Step 5: Solve for x
   x = 5,257,553.75/2,638.79
6. Step 6: Final answer
   x = 1,992.41