Finding the Fourth Proportional to 2,028.31, 3,042.43 and 641.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,028.31 : 3,042.43 = 641.59 : x
2. Step 2: Convert to fraction form
   2,028.31/3,042.43 = 641.59/x
3. Step 3: Cross multiply
   2,028.31x = 3,042.43 × 641.59
4. Step 4: Simplify right side
   2,028.31x = 1,951,983.45
5. Step 5: Solve for x
   x = 1,951,983.45/2,028.31
6. Step 6: Final answer
   x = 962.37