Finding the Fourth Proportional to 23,831.33, 32,883.72 and 13,221.05

Step by Step Solution

1. Step 1: Write the proportion equation
   23,831.33 : 32,883.72 = 13,221.05 : x
2. Step 2: Convert to fraction form
   23,831.33/32,883.72 = 13,221.05/x
3. Step 3: Cross multiply
   23,831.33x = 32,883.72 × 13,221.05
4. Step 4: Simplify right side
   23,831.33x = 434,757,141.89
5. Step 5: Solve for x
   x = 434,757,141.89/23,831.33
6. Step 6: Final answer
   x = 18,243.10