Finding the Fourth Proportional to 21,698.29, 29,942.22 and 12,136.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,698.29 : 29,942.22 = 12,136.52 : x
2. Step 2: Convert to fraction form
   21,698.29/29,942.22 = 12,136.52/x
3. Step 3: Cross multiply
   21,698.29x = 29,942.22 × 12,136.52
4. Step 4: Simplify right side
   21,698.29x = 363,394,171.82
5. Step 5: Solve for x
   x = 363,394,171.82/21,698.29
6. Step 6: Final answer
   x = 16,747.60