Finding the Fourth Proportional to 22,238, 30,689.40 and 12,302

Step by Step Solution

1. Step 1: Write the proportion equation
   22,238 : 30,689.40 = 12,302 : x
2. Step 2: Convert to fraction form
   22,238/30,689.40 = 12,302/x
3. Step 3: Cross multiply
   22,238x = 30,689.40 × 12,302
4. Step 4: Simplify right side
   22,238x = 377,540,998.80
5. Step 5: Solve for x
   x = 377,540,998.80/22,238
6. Step 6: Final answer
   x = 16,977.29