Finding the Fourth Proportional to 16,580.25, 22,880.79 and 9,128.25

Step by Step Solution

1. Step 1: Write the proportion equation
   16,580.25 : 22,880.79 = 9,128.25 : x
2. Step 2: Convert to fraction form
   16,580.25/22,880.79 = 9,128.25/x
3. Step 3: Cross multiply
   16,580.25x = 22,880.79 × 9,128.25
4. Step 4: Simplify right side
   16,580.25x = 208,861,571.32
5. Step 5: Solve for x
   x = 208,861,571.32/16,580.25
6. Step 6: Final answer
   x = 12,597.01