Finding the Fourth Proportional to 21,369.18, 31,997.79 and 13,952.82

Step by Step Solution

1. Step 1: Write the proportion equation
   21,369.18 : 31,997.79 = 13,952.82 : x
2. Step 2: Convert to fraction form
   21,369.18/31,997.79 = 13,952.82/x
3. Step 3: Cross multiply
   21,369.18x = 31,997.79 × 13,952.82
4. Step 4: Simplify right side
   21,369.18x = 446,459,404.27
5. Step 5: Solve for x
   x = 446,459,404.27/21,369.18
6. Step 6: Final answer
   x = 20,892.68