Finding the Fourth Proportional to 16,561.20, 22,847.71 and 9,389.60

Step by Step Solution

1. Step 1: Write the proportion equation
   16,561.20 : 22,847.71 = 9,389.60 : x
2. Step 2: Convert to fraction form
   16,561.20/22,847.71 = 9,389.60/x
3. Step 3: Cross multiply
   16,561.20x = 22,847.71 × 9,389.60
4. Step 4: Simplify right side
   16,561.20x = 214,530,810.87
5. Step 5: Solve for x
   x = 214,530,810.87/16,561.20
6. Step 6: Final answer
   x = 12,953.82