Finding the Fourth Proportional to 1,142.33, 1,716.71 and 680.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,142.33 : 1,716.71 = 680.19 : x
2. Step 2: Convert to fraction form
   1,142.33/1,716.71 = 680.19/x
3. Step 3: Cross multiply
   1,142.33x = 1,716.71 × 680.19
4. Step 4: Simplify right side
   1,142.33x = 1,167,685.57
5. Step 5: Solve for x
   x = 1,167,685.57/1,142.33
6. Step 6: Final answer
   x = 1,022.20