Finding the Fourth Proportional to 16,722.72, 23,076.90 and 9,648.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,722.72 : 23,076.90 = 9,648.72 : x
2. Step 2: Convert to fraction form
   16,722.72/23,076.90 = 9,648.72/x
3. Step 3: Cross multiply
   16,722.72x = 23,076.90 × 9,648.72
4. Step 4: Simplify right side
   16,722.72x = 222,662,546.57
5. Step 5: Solve for x
   x = 222,662,546.57/16,722.72
6. Step 6: Final answer
   x = 13,314.97