Finding the Fourth Proportional to 16,785.60, 23,165.90 and 9,616.08

Step by Step Solution

1. Step 1: Write the proportion equation
   16,785.60 : 23,165.90 = 9,616.08 : x
2. Step 2: Convert to fraction form
   16,785.60/23,165.90 = 9,616.08/x
3. Step 3: Cross multiply
   16,785.60x = 23,165.90 × 9,616.08
4. Step 4: Simplify right side
   16,785.60x = 222,765,099.59
5. Step 5: Solve for x
   x = 222,765,099.59/16,785.60
6. Step 6: Final answer
   x = 13,271.20