Finding the Fourth Proportional to 2,028.27, 3,042.18 and 641.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,028.27 : 3,042.18 = 641.55 : x
2. Step 2: Convert to fraction form
   2,028.27/3,042.18 = 641.55/x
3. Step 3: Cross multiply
   2,028.27x = 3,042.18 × 641.55
4. Step 4: Simplify right side
   2,028.27x = 1,951,710.58
5. Step 5: Solve for x
   x = 1,951,710.58/2,028.27
6. Step 6: Final answer
   x = 962.25