Finding the Fourth Proportional to 1,442.28, 1,990.59 and 946.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,442.28 : 1,990.59 = 946.26 : x
2. Step 2: Convert to fraction form
   1,442.28/1,990.59 = 946.26/x
3. Step 3: Cross multiply
   1,442.28x = 1,990.59 × 946.26
4. Step 4: Simplify right side
   1,442.28x = 1,883,615.69
5. Step 5: Solve for x
   x = 1,883,615.69/1,442.28
6. Step 6: Final answer
   x = 1,306.00