Finding the Fourth Proportional to 8,379.25, 12,570.24 and 2,831.33

Step by Step Solution

1. Step 1: Write the proportion equation
   8,379.25 : 12,570.24 = 2,831.33 : x
2. Step 2: Convert to fraction form
   8,379.25/12,570.24 = 2,831.33/x
3. Step 3: Cross multiply
   8,379.25x = 12,570.24 × 2,831.33
4. Step 4: Simplify right side
   8,379.25x = 35,590,488.38
5. Step 5: Solve for x
   x = 35,590,488.38/8,379.25
6. Step 6: Final answer
   x = 4,247.46