Finding the Fourth Proportional to 16,499.42, 22,786.36 and 12,682.70

Step by Step Solution

1. Step 1: Write the proportion equation
   16,499.42 : 22,786.36 = 12,682.70 : x
2. Step 2: Convert to fraction form
   16,499.42/22,786.36 = 12,682.70/x
3. Step 3: Cross multiply
   16,499.42x = 22,786.36 × 12,682.70
4. Step 4: Simplify right side
   16,499.42x = 288,992,567.97
5. Step 5: Solve for x
   x = 288,992,567.97/16,499.42
6. Step 6: Final answer
   x = 17,515.32