Finding the Fourth Proportional to 22,790, 31,450.24 and 12,854

Step by Step Solution

1. Step 1: Write the proportion equation
   22,790 : 31,450.24 = 12,854 : x
2. Step 2: Convert to fraction form
   22,790/31,450.24 = 12,854/x
3. Step 3: Cross multiply
   22,790x = 31,450.24 × 12,854
4. Step 4: Simplify right side
   22,790x = 404,261,384.96
5. Step 5: Solve for x
   x = 404,261,384.96/22,790
6. Step 6: Final answer
   x = 17,738.54