Finding the Fourth Proportional to 16,729.12, 23,085.76 and 9,656.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,729.12 : 23,085.76 = 9,656.72 : x
2. Step 2: Convert to fraction form
   16,729.12/23,085.76 = 9,656.72/x
3. Step 3: Cross multiply
   16,729.12x = 23,085.76 × 9,656.72
4. Step 4: Simplify right side
   16,729.12x = 222,932,720.31
5. Step 5: Solve for x
   x = 222,932,720.31/16,729.12
6. Step 6: Final answer
   x = 13,326.03