Finding the Fourth Proportional to 16,139.69, 22,272.77 and 8,969.60

Step by Step Solution

1. Step 1: Write the proportion equation
   16,139.69 : 22,272.77 = 8,969.60 : x
2. Step 2: Convert to fraction form
   16,139.69/22,272.77 = 8,969.60/x
3. Step 3: Cross multiply
   16,139.69x = 22,272.77 × 8,969.60
4. Step 4: Simplify right side
   16,139.69x = 199,777,915.90
5. Step 5: Solve for x
   x = 199,777,915.90/16,139.69
6. Step 6: Final answer
   x = 12,378.05