Finding the Fourth Proportional to 16,436.86, 22,684.45 and 9,724.65

Step by Step Solution

1. Step 1: Write the proportion equation
   16,436.86 : 22,684.45 = 9,724.65 : x
2. Step 2: Convert to fraction form
   16,436.86/22,684.45 = 9,724.65/x
3. Step 3: Cross multiply
   16,436.86x = 22,684.45 × 9,724.65
4. Step 4: Simplify right side
   16,436.86x = 220,598,336.69
5. Step 5: Solve for x
   x = 220,598,336.69/16,436.86
6. Step 6: Final answer
   x = 13,420.95