Finding the Fourth Proportional to 1,326.67, 1,987.83 and 806.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,326.67 : 1,987.83 = 806.82 : x
2. Step 2: Convert to fraction form
   1,326.67/1,987.83 = 806.82/x
3. Step 3: Cross multiply
   1,326.67x = 1,987.83 × 806.82
4. Step 4: Simplify right side
   1,326.67x = 1,603,822.46
5. Step 5: Solve for x
   x = 1,603,822.46/1,326.67
6. Step 6: Final answer
   x = 1,208.91