Finding the Fourth Proportional to 23,929.71, 33,021.71 and 13,172.49

Step by Step Solution

1. Step 1: Write the proportion equation
   23,929.71 : 33,021.71 = 13,172.49 : x
2. Step 2: Convert to fraction form
   23,929.71/33,021.71 = 13,172.49/x
3. Step 3: Cross multiply
   23,929.71x = 33,021.71 × 13,172.49
4. Step 4: Simplify right side
   23,929.71x = 434,978,128.29
5. Step 5: Solve for x
   x = 434,978,128.29/23,929.71
6. Step 6: Final answer
   x = 18,177.32