Finding the Fourth Proportional to 2,628.66, 3,939.49 and 983.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,628.66 : 3,939.49 = 983.55 : x
2. Step 2: Convert to fraction form
   2,628.66/3,939.49 = 983.55/x
3. Step 3: Cross multiply
   2,628.66x = 3,939.49 × 983.55
4. Step 4: Simplify right side
   2,628.66x = 3,874,685.39
5. Step 5: Solve for x
   x = 3,874,685.39/2,628.66
6. Step 6: Final answer
   x = 1,474.02