Finding the Fourth Proportional to 1,018.23, 1,403.98 and 831.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.23 : 1,403.98 = 831.14 : x
2. Step 2: Convert to fraction form
   1,018.23/1,403.98 = 831.14/x
3. Step 3: Cross multiply
   1,018.23x = 1,403.98 × 831.14
4. Step 4: Simplify right side
   1,018.23x = 1,166,903.94
5. Step 5: Solve for x
   x = 1,166,903.94/1,018.23
6. Step 6: Final answer
   x = 1,146.01