Finding the Fourth Proportional to 22,225, 30,638.82 and 15,142.36

Step by Step Solution

1. Step 1: Write the proportion equation
   22,225 : 30,638.82 = 15,142.36 : x
2. Step 2: Convert to fraction form
   22,225/30,638.82 = 15,142.36/x
3. Step 3: Cross multiply
   22,225x = 30,638.82 × 15,142.36
4. Step 4: Simplify right side
   22,225x = 463,944,042.42
5. Step 5: Solve for x
   x = 463,944,042.42/22,225
6. Step 6: Final answer
   x = 20,874.87