Finding the Fourth Proportional to 1,045.06, 1,567.98 and 680.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,045.06 : 1,567.98 = 680.56 : x
2. Step 2: Convert to fraction form
   1,045.06/1,567.98 = 680.56/x
3. Step 3: Cross multiply
   1,045.06x = 1,567.98 × 680.56
4. Step 4: Simplify right side
   1,045.06x = 1,067,104.47
5. Step 5: Solve for x
   x = 1,067,104.47/1,045.06
6. Step 6: Final answer
   x = 1,021.09