Finding the Fourth Proportional to 2,638.66, 3,958.59 and 995.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,638.66 : 3,958.59 = 995.23 : x
2. Step 2: Convert to fraction form
   2,638.66/3,958.59 = 995.23/x
3. Step 3: Cross multiply
   2,638.66x = 3,958.59 × 995.23
4. Step 4: Simplify right side
   2,638.66x = 3,939,707.53
5. Step 5: Solve for x
   x = 3,939,707.53/2,638.66
6. Step 6: Final answer
   x = 1,493.07