Finding the Fourth Proportional to 21,441.29, 32,172.89 and 10,209.33

Step by Step Solution

1. Step 1: Write the proportion equation
   21,441.29 : 32,172.89 = 10,209.33 : x
2. Step 2: Convert to fraction form
   21,441.29/32,172.89 = 10,209.33/x
3. Step 3: Cross multiply
   21,441.29x = 32,172.89 × 10,209.33
4. Step 4: Simplify right side
   21,441.29x = 328,463,600.02
5. Step 5: Solve for x
   x = 328,463,600.02/21,441.29
6. Step 6: Final answer
   x = 15,319.21