Finding the Fourth Proportional to 3,831.83, 5,288.05 and 2,153.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,831.83 : 5,288.05 = 2,153.56 : x
2. Step 2: Convert to fraction form
   3,831.83/5,288.05 = 2,153.56/x
3. Step 3: Cross multiply
   3,831.83x = 5,288.05 × 2,153.56
4. Step 4: Simplify right side
   3,831.83x = 11,388,132.96
5. Step 5: Solve for x
   x = 11,388,132.96/3,831.83
6. Step 6: Final answer
   x = 2,971.98