Finding the Fourth Proportional to 16,392.69, 22,622.81 and 12,406.77

Step by Step Solution

1. Step 1: Write the proportion equation
   16,392.69 : 22,622.81 = 12,406.77 : x
2. Step 2: Convert to fraction form
   16,392.69/22,622.81 = 12,406.77/x
3. Step 3: Cross multiply
   16,392.69x = 22,622.81 × 12,406.77
4. Step 4: Simplify right side
   16,392.69x = 280,676,000.42
5. Step 5: Solve for x
   x = 280,676,000.42/16,392.69
6. Step 6: Final answer
   x = 17,122.02