Finding the Fourth Proportional to 22,021.91, 30,404.87 and 13,072.29

Step by Step Solution

1. Step 1: Write the proportion equation
   22,021.91 : 30,404.87 = 13,072.29 : x
2. Step 2: Convert to fraction form
   22,021.91/30,404.87 = 13,072.29/x
3. Step 3: Cross multiply
   22,021.91x = 30,404.87 × 13,072.29
4. Step 4: Simplify right side
   22,021.91x = 397,461,147.69
5. Step 5: Solve for x
   x = 397,461,147.69/22,021.91
6. Step 6: Final answer
   x = 18,048.44