Finding the Fourth Proportional to 2,067.51, 3,100.92 and 680.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,067.51 : 3,100.92 = 680.88 : x
2. Step 2: Convert to fraction form
   2,067.51/3,100.92 = 680.88/x
3. Step 3: Cross multiply
   2,067.51x = 3,100.92 × 680.88
4. Step 4: Simplify right side
   2,067.51x = 2,111,354.41
5. Step 5: Solve for x
   x = 2,111,354.41/2,067.51
6. Step 6: Final answer
   x = 1,021.21