Finding the Fourth Proportional to 2,028.52, 3,042.78 and 641.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,028.52 : 3,042.78 = 641.98 : x
2. Step 2: Convert to fraction form
   2,028.52/3,042.78 = 641.98/x
3. Step 3: Cross multiply
   2,028.52x = 3,042.78 × 641.98
4. Step 4: Simplify right side
   2,028.52x = 1,953,403.90
5. Step 5: Solve for x
   x = 1,953,403.90/2,028.52
6. Step 6: Final answer
   x = 962.97