Finding the Fourth Proportional to 2,628.80, 3,942.94 and 984.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,628.80 : 3,942.94 = 984.56 : x
2. Step 2: Convert to fraction form
   2,628.80/3,942.94 = 984.56/x
3. Step 3: Cross multiply
   2,628.80x = 3,942.94 × 984.56
4. Step 4: Simplify right side
   2,628.80x = 3,882,061.01
5. Step 5: Solve for x
   x = 3,882,061.01/2,628.80
6. Step 6: Final answer
   x = 1,476.74