Finding the Fourth Proportional to 2,001.58, 3,002.72 and 685.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,001.58 : 3,002.72 = 685.48 : x
2. Step 2: Convert to fraction form
   2,001.58/3,002.72 = 685.48/x
3. Step 3: Cross multiply
   2,001.58x = 3,002.72 × 685.48
4. Step 4: Simplify right side
   2,001.58x = 2,058,304.51
5. Step 5: Solve for x
   x = 2,058,304.51/2,001.58
6. Step 6: Final answer
   x = 1,028.34