Finding the Fourth Proportional to 21,562.65, 29,756.42 and 12,131.22

Step by Step Solution

1. Step 1: Write the proportion equation
   21,562.65 : 29,756.42 = 12,131.22 : x
2. Step 2: Convert to fraction form
   21,562.65/29,756.42 = 12,131.22/x
3. Step 3: Cross multiply
   21,562.65x = 29,756.42 × 12,131.22
4. Step 4: Simplify right side
   21,562.65x = 360,981,616.78
5. Step 5: Solve for x
   x = 360,981,616.78/21,562.65
6. Step 6: Final answer
   x = 16,741.06