Finding the Fourth Proportional to 16,778.16, 23,158.53 and 9,612.09

Step by Step Solution

1. Step 1: Write the proportion equation
   16,778.16 : 23,158.53 = 9,612.09 : x
2. Step 2: Convert to fraction form
   16,778.16/23,158.53 = 9,612.09/x
3. Step 3: Cross multiply
   16,778.16x = 23,158.53 × 9,612.09
4. Step 4: Simplify right side
   16,778.16x = 222,601,874.63
5. Step 5: Solve for x
   x = 222,601,874.63/16,778.16
6. Step 6: Final answer
   x = 13,267.36