Finding the Fourth Proportional to 16,802.72, 23,184.24 and 9,728.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,802.72 : 23,184.24 = 9,728.72 : x
2. Step 2: Convert to fraction form
   16,802.72/23,184.24 = 9,728.72/x
3. Step 3: Cross multiply
   16,802.72x = 23,184.24 × 9,728.72
4. Step 4: Simplify right side
   16,802.72x = 225,552,979.37
5. Step 5: Solve for x
   x = 225,552,979.37/16,802.72
6. Step 6: Final answer
   x = 13,423.60