Finding the Fourth Proportional to 1,274.33, 1,758.83 and 831.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,274.33 : 1,758.83 = 831.46 : x
2. Step 2: Convert to fraction form
   1,274.33/1,758.83 = 831.46/x
3. Step 3: Cross multiply
   1,274.33x = 1,758.83 × 831.46
4. Step 4: Simplify right side
   1,274.33x = 1,462,396.79
5. Step 5: Solve for x
   x = 1,462,396.79/1,274.33
6. Step 6: Final answer
   x = 1,147.58