Finding the Fourth Proportional to 3,831.89, 5,288.03 and 2,153.37

Step by Step Solution

1. Step 1: Write the proportion equation
   3,831.89 : 5,288.03 = 2,153.37 : x
2. Step 2: Convert to fraction form
   3,831.89/5,288.03 = 2,153.37/x
3. Step 3: Cross multiply
   3,831.89x = 5,288.03 × 2,153.37
4. Step 4: Simplify right side
   3,831.89x = 11,387,085.16
5. Step 5: Solve for x
   x = 11,387,085.16/3,831.89
6. Step 6: Final answer
   x = 2,971.66