Finding the Fourth Proportional to 21,136.72, 29,167.96 and 12,062.59

Step by Step Solution

1. Step 1: Write the proportion equation
   21,136.72 : 29,167.96 = 12,062.59 : x
2. Step 2: Convert to fraction form
   21,136.72/29,167.96 = 12,062.59/x
3. Step 3: Cross multiply
   21,136.72x = 29,167.96 × 12,062.59
4. Step 4: Simplify right side
   21,136.72x = 351,840,936.46
5. Step 5: Solve for x
   x = 351,840,936.46/21,136.72
6. Step 6: Final answer
   x = 16,645.96