Finding the Fourth Proportional to 22,419, 30,938.22 and 12,993.03

Step by Step Solution

1. Step 1: Write the proportion equation
   22,419 : 30,938.22 = 12,993.03 : x
2. Step 2: Convert to fraction form
   22,419/30,938.22 = 12,993.03/x
3. Step 3: Cross multiply
   22,419x = 30,938.22 × 12,993.03
4. Step 4: Simplify right side
   22,419x = 401,981,220.61
5. Step 5: Solve for x
   x = 401,981,220.61/22,419
6. Step 6: Final answer
   x = 17,930.38