Finding the Fourth Proportional to 16,720.05, 23,078.61 and 9,651.18

Step by Step Solution

1. Step 1: Write the proportion equation
   16,720.05 : 23,078.61 = 9,651.18 : x
2. Step 2: Convert to fraction form
   16,720.05/23,078.61 = 9,651.18/x
3. Step 3: Cross multiply
   16,720.05x = 23,078.61 × 9,651.18
4. Step 4: Simplify right side
   16,720.05x = 222,735,819.26
5. Step 5: Solve for x
   x = 222,735,819.26/16,720.05
6. Step 6: Final answer
   x = 13,321.48