Finding the Fourth Proportional to 16,661.76, 22,991.52 and 9,586.80

Step by Step Solution

1. Step 1: Write the proportion equation
   16,661.76 : 22,991.52 = 9,586.80 : x
2. Step 2: Convert to fraction form
   16,661.76/22,991.52 = 9,586.80/x
3. Step 3: Cross multiply
   16,661.76x = 22,991.52 × 9,586.80
4. Step 4: Simplify right side
   16,661.76x = 220,415,103.94
5. Step 5: Solve for x
   x = 220,415,103.94/16,661.76
6. Step 6: Final answer
   x = 13,228.80