Finding the Fourth Proportional to 23,942.72, 35,880.78 and 12,231.20

Step by Step Solution

1. Step 1: Write the proportion equation
   23,942.72 : 35,880.78 = 12,231.20 : x
2. Step 2: Convert to fraction form
   23,942.72/35,880.78 = 12,231.20/x
3. Step 3: Cross multiply
   23,942.72x = 35,880.78 × 12,231.20
4. Step 4: Simplify right side
   23,942.72x = 438,864,996.34
5. Step 5: Solve for x
   x = 438,864,996.34/23,942.72
6. Step 6: Final answer
   x = 18,329.79