Finding the Fourth Proportional to 21,562.72, 29,756.22 and 12,131.24

Step by Step Solution

1. Step 1: Write the proportion equation
   21,562.72 : 29,756.22 = 12,131.24 : x
2. Step 2: Convert to fraction form
   21,562.72/29,756.22 = 12,131.24/x
3. Step 3: Cross multiply
   21,562.72x = 29,756.22 × 12,131.24
4. Step 4: Simplify right side
   21,562.72x = 360,979,846.31
5. Step 5: Solve for x
   x = 360,979,846.31/21,562.72
6. Step 6: Final answer
   x = 16,740.92