Finding the Fourth Proportional to 2,628.20, 3,942.71 and 984.65

Step by Step Solution

1. Step 1: Write the proportion equation
   2,628.20 : 3,942.71 = 984.65 : x
2. Step 2: Convert to fraction form
   2,628.20/3,942.71 = 984.65/x
3. Step 3: Cross multiply
   2,628.20x = 3,942.71 × 984.65
4. Step 4: Simplify right side
   2,628.20x = 3,882,164.76
5. Step 5: Solve for x
   x = 3,882,164.76/2,628.20
6. Step 6: Final answer
   x = 1,477.12