Finding the Fourth Proportional to 2,067.47, 3,101.40 and 680.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,067.47 : 3,101.40 = 680.80 : x
2. Step 2: Convert to fraction form
   2,067.47/3,101.40 = 680.80/x
3. Step 3: Cross multiply
   2,067.47x = 3,101.40 × 680.80
4. Step 4: Simplify right side
   2,067.47x = 2,111,425.37
5. Step 5: Solve for x
   x = 2,111,425.37/2,067.47
6. Step 6: Final answer
   x = 1,021.26