Finding the Fourth Proportional to 1,290.28, 1,933.71 and 674.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,290.28 : 1,933.71 = 674.50 : x
2. Step 2: Convert to fraction form
   1,290.28/1,933.71 = 674.50/x
3. Step 3: Cross multiply
   1,290.28x = 1,933.71 × 674.50
4. Step 4: Simplify right side
   1,290.28x = 1,304,287.40
5. Step 5: Solve for x
   x = 1,304,287.40/1,290.28
6. Step 6: Final answer
   x = 1,010.86