Finding the Fourth Proportional to 16,809.40, 23,196.79 and 9,255.54

Step by Step Solution

1. Step 1: Write the proportion equation
   16,809.40 : 23,196.79 = 9,255.54 : x
2. Step 2: Convert to fraction form
   16,809.40/23,196.79 = 9,255.54/x
3. Step 3: Cross multiply
   16,809.40x = 23,196.79 × 9,255.54
4. Step 4: Simplify right side
   16,809.40x = 214,698,817.72
5. Step 5: Solve for x
   x = 214,698,817.72/16,809.40
6. Step 6: Final answer
   x = 12,772.54