Finding the Fourth Proportional to 21,136.21, 29,153.89 and 16,089.10

Step by Step Solution

1. Step 1: Write the proportion equation
   21,136.21 : 29,153.89 = 16,089.10 : x
2. Step 2: Convert to fraction form
   21,136.21/29,153.89 = 16,089.10/x
3. Step 3: Cross multiply
   21,136.21x = 29,153.89 × 16,089.10
4. Step 4: Simplify right side
   21,136.21x = 469,059,851.60
5. Step 5: Solve for x
   x = 469,059,851.60/21,136.21
6. Step 6: Final answer
   x = 22,192.24