Finding the Fourth Proportional to 2,639.34, 3,958.33 and 995.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,639.34 : 3,958.33 = 995.40 : x
2. Step 2: Convert to fraction form
   2,639.34/3,958.33 = 995.40/x
3. Step 3: Cross multiply
   2,639.34x = 3,958.33 × 995.40
4. Step 4: Simplify right side
   2,639.34x = 3,940,099.40
5. Step 5: Solve for x
   x = 3,940,099.40/2,639.34
6. Step 6: Final answer
   x = 1,492.84