Finding the Fourth Proportional to 16,462.69, 22,728.85 and 12,678.73

Step by Step Solution

1. Step 1: Write the proportion equation
   16,462.69 : 22,728.85 = 12,678.73 : x
2. Step 2: Convert to fraction form
   16,462.69/22,728.85 = 12,678.73/x
3. Step 3: Cross multiply
   16,462.69x = 22,728.85 × 12,678.73
4. Step 4: Simplify right side
   16,462.69x = 288,172,935.16
5. Step 5: Solve for x
   x = 288,172,935.16/16,462.69
6. Step 6: Final answer
   x = 17,504.60