Finding the Fourth Proportional to 2,048.78, 3,073.20 and 680.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,048.78 : 3,073.20 = 680.78 : x
2. Step 2: Convert to fraction form
   2,048.78/3,073.20 = 680.78/x
3. Step 3: Cross multiply
   2,048.78x = 3,073.20 × 680.78
4. Step 4: Simplify right side
   2,048.78x = 2,092,173.10
5. Step 5: Solve for x
   x = 2,092,173.10/2,048.78
6. Step 6: Final answer
   x = 1,021.18