Finding the Fourth Proportional to 1,045.86, 1,567.70 and 680.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,045.86 : 1,567.70 = 680.82 : x
2. Step 2: Convert to fraction form
   1,045.86/1,567.70 = 680.82/x
3. Step 3: Cross multiply
   1,045.86x = 1,567.70 × 680.82
4. Step 4: Simplify right side
   1,045.86x = 1,067,321.51
5. Step 5: Solve for x
   x = 1,067,321.51/1,045.86
6. Step 6: Final answer
   x = 1,020.52