Finding the Fourth Proportional to 16,766.16, 23,137.81 and 9,212.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,766.16 : 23,137.81 = 9,212.72 : x
2. Step 2: Convert to fraction form
   16,766.16/23,137.81 = 9,212.72/x
3. Step 3: Cross multiply
   16,766.16x = 23,137.81 × 9,212.72
4. Step 4: Simplify right side
   16,766.16x = 213,162,318.76
5. Step 5: Solve for x
   x = 213,162,318.76/16,766.16
6. Step 6: Final answer
   x = 12,713.84