Finding the Fourth Proportional to 2,049.21, 3,072.86 and 680.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,049.21 : 3,072.86 = 680.25 : x
2. Step 2: Convert to fraction form
   2,049.21/3,072.86 = 680.25/x
3. Step 3: Cross multiply
   2,049.21x = 3,072.86 × 680.25
4. Step 4: Simplify right side
   2,049.21x = 2,090,309.61
5. Step 5: Solve for x
   x = 2,090,309.61/2,049.21
6. Step 6: Final answer
   x = 1,020.06