Finding the Fourth Proportional to 16,718.72, 23,071.92 and 9,645.44

Step by Step Solution

1. Step 1: Write the proportion equation
   16,718.72 : 23,071.92 = 9,645.44 : x
2. Step 2: Convert to fraction form
   16,718.72/23,071.92 = 9,645.44/x
3. Step 3: Cross multiply
   16,718.72x = 23,071.92 × 9,645.44
4. Step 4: Simplify right side
   16,718.72x = 222,538,820.04
5. Step 5: Solve for x
   x = 222,538,820.04/16,718.72
6. Step 6: Final answer
   x = 13,310.76