Finding the Fourth Proportional to 20,196.95, 27,878.10 and 12,136.48

Step by Step Solution

1. Step 1: Write the proportion equation
   20,196.95 : 27,878.10 = 12,136.48 : x
2. Step 2: Convert to fraction form
   20,196.95/27,878.10 = 12,136.48/x
3. Step 3: Cross multiply
   20,196.95x = 27,878.10 × 12,136.48
4. Step 4: Simplify right side
   20,196.95x = 338,342,078.83
5. Step 5: Solve for x
   x = 338,342,078.83/20,196.95
6. Step 6: Final answer
   x = 16,752.14