Finding the Fourth Proportional to 2,624.40, 3,930.60 and 1,323

Step by Step Solution

1. Step 1: Write the proportion equation
   2,624.40 : 3,930.60 = 1,323 : x
2. Step 2: Convert to fraction form
   2,624.40/3,930.60 = 1,323/x
3. Step 3: Cross multiply
   2,624.40x = 3,930.60 × 1,323
4. Step 4: Simplify right side
   2,624.40x = 5,200,183.80
5. Step 5: Solve for x
   x = 5,200,183.80/2,624.40
6. Step 6: Final answer
   x = 1,981.48