Finding the Fourth Proportional to 2,044.69, 3,065.92 and 638.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,044.69 : 3,065.92 = 638.72 : x
2. Step 2: Convert to fraction form
   2,044.69/3,065.92 = 638.72/x
3. Step 3: Cross multiply
   2,044.69x = 3,065.92 × 638.72
4. Step 4: Simplify right side
   2,044.69x = 1,958,270.49
5. Step 5: Solve for x
   x = 1,958,270.49/2,044.69
6. Step 6: Final answer
   x = 957.73