Finding the Fourth Proportional to 21,136.52, 29,168.82 and 12,182.54

Step by Step Solution

1. Step 1: Write the proportion equation
   21,136.52 : 29,168.82 = 12,182.54 : x
2. Step 2: Convert to fraction form
   21,136.52/29,168.82 = 12,182.54/x
3. Step 3: Cross multiply
   21,136.52x = 29,168.82 × 12,182.54
4. Step 4: Simplify right side
   21,136.52x = 355,350,316.40
5. Step 5: Solve for x
   x = 355,350,316.40/21,136.52
6. Step 6: Final answer
   x = 16,812.15