Finding the Fourth Proportional to 2,662.88, 3,991.70 and 995.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,662.88 : 3,991.70 = 995.78 : x
2. Step 2: Convert to fraction form
   2,662.88/3,991.70 = 995.78/x
3. Step 3: Cross multiply
   2,662.88x = 3,991.70 × 995.78
4. Step 4: Simplify right side
   2,662.88x = 3,974,855.03
5. Step 5: Solve for x
   x = 3,974,855.03/2,662.88
6. Step 6: Final answer
   x = 1,492.69