Finding the Fourth Proportional to 3,831.71, 5,287.59 and 2,153.27

Step by Step Solution

1. Step 1: Write the proportion equation
   3,831.71 : 5,287.59 = 2,153.27 : x
2. Step 2: Convert to fraction form
   3,831.71/5,287.59 = 2,153.27/x
3. Step 3: Cross multiply
   3,831.71x = 5,287.59 × 2,153.27
4. Step 4: Simplify right side
   3,831.71x = 11,385,608.92
5. Step 5: Solve for x
   x = 11,385,608.92/3,831.71
6. Step 6: Final answer
   x = 2,971.42