Finding the Fourth Proportional to 16,236.50, 22,406.40 and 8,784.50

Step by Step Solution

1. Step 1: Write the proportion equation
   16,236.50 : 22,406.40 = 8,784.50 : x
2. Step 2: Convert to fraction form
   16,236.50/22,406.40 = 8,784.50/x
3. Step 3: Cross multiply
   16,236.50x = 22,406.40 × 8,784.50
4. Step 4: Simplify right side
   16,236.50x = 196,829,020.80
5. Step 5: Solve for x
   x = 196,829,020.80/16,236.50
6. Step 6: Final answer
   x = 12,122.63