Finding the Fourth Proportional to 16,789.20, 23,167.28 and 9,714.24

Step by Step Solution

1. Step 1: Write the proportion equation
   16,789.20 : 23,167.28 = 9,714.24 : x
2. Step 2: Convert to fraction form
   16,789.20/23,167.28 = 9,714.24/x
3. Step 3: Cross multiply
   16,789.20x = 23,167.28 × 9,714.24
4. Step 4: Simplify right side
   16,789.20x = 225,052,518.07
5. Step 5: Solve for x
   x = 225,052,518.07/16,789.20
6. Step 6: Final answer
   x = 13,404.60