Finding the Fourth Proportional to 1,362.25, 1,879.94 and 831.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,362.25 : 1,879.94 = 831.16 : x
2. Step 2: Convert to fraction form
   1,362.25/1,879.94 = 831.16/x
3. Step 3: Cross multiply
   1,362.25x = 1,879.94 × 831.16
4. Step 4: Simplify right side
   1,362.25x = 1,562,530.93
5. Step 5: Solve for x
   x = 1,562,530.93/1,362.25
6. Step 6: Final answer
   x = 1,147.02