Finding the Fourth Proportional to 16,728.82, 23,085.48 and 9,175.30

Step by Step Solution

1. Step 1: Write the proportion equation
   16,728.82 : 23,085.48 = 9,175.30 : x
2. Step 2: Convert to fraction form
   16,728.82/23,085.48 = 9,175.30/x
3. Step 3: Cross multiply
   16,728.82x = 23,085.48 × 9,175.30
4. Step 4: Simplify right side
   16,728.82x = 211,816,204.64
5. Step 5: Solve for x
   x = 211,816,204.64/16,728.82
6. Step 6: Final answer
   x = 12,661.75