Finding the Fourth Proportional to 8,831.49, 12,188.54 and 5,105.49

Step by Step Solution

1. Step 1: Write the proportion equation
   8,831.49 : 12,188.54 = 5,105.49 : x
2. Step 2: Convert to fraction form
   8,831.49/12,188.54 = 5,105.49/x
3. Step 3: Cross multiply
   8,831.49x = 12,188.54 × 5,105.49
4. Step 4: Simplify right side
   8,831.49x = 62,228,443.56
5. Step 5: Solve for x
   x = 62,228,443.56/8,831.49
6. Step 6: Final answer
   x = 7,046.20