Finding the Fourth Proportional to 16,708.42, 23,057.55 and 9,155.22

Step by Step Solution

1. Step 1: Write the proportion equation
   16,708.42 : 23,057.55 = 9,155.22 : x
2. Step 2: Convert to fraction form
   16,708.42/23,057.55 = 9,155.22/x
3. Step 3: Cross multiply
   16,708.42x = 23,057.55 × 9,155.22
4. Step 4: Simplify right side
   16,708.42x = 211,096,942.91
5. Step 5: Solve for x
   x = 211,096,942.91/16,708.42
6. Step 6: Final answer
   x = 12,634.17