Finding the Fourth Proportional to 2,638.98, 3,958.52 and 996.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,638.98 : 3,958.52 = 996.30 : x
2. Step 2: Convert to fraction form
   2,638.98/3,958.52 = 996.30/x
3. Step 3: Cross multiply
   2,638.98x = 3,958.52 × 996.30
4. Step 4: Simplify right side
   2,638.98x = 3,943,868.49
5. Step 5: Solve for x
   x = 3,943,868.49/2,638.98
6. Step 6: Final answer
   x = 1,494.47