Finding the Fourth Proportional to 21,529.89, 29,721.33 and 14,371.89

Step by Step Solution

1. Step 1: Write the proportion equation
   21,529.89 : 29,721.33 = 14,371.89 : x
2. Step 2: Convert to fraction form
   21,529.89/29,721.33 = 14,371.89/x
3. Step 3: Cross multiply
   21,529.89x = 29,721.33 × 14,371.89
4. Step 4: Simplify right side
   21,529.89x = 427,151,685.41
5. Step 5: Solve for x
   x = 427,151,685.41/21,529.89
6. Step 6: Final answer
   x = 19,839.94