Finding the Fourth Proportional to 20,796.83, 31,198.49 and 12,474.89

Step by Step Solution

1. Step 1: Write the proportion equation
   20,796.83 : 31,198.49 = 12,474.89 : x
2. Step 2: Convert to fraction form
   20,796.83/31,198.49 = 12,474.89/x
3. Step 3: Cross multiply
   20,796.83x = 31,198.49 × 12,474.89
4. Step 4: Simplify right side
   20,796.83x = 389,197,668.54
5. Step 5: Solve for x
   x = 389,197,668.54/20,796.83
6. Step 6: Final answer
   x = 18,714.28