Finding the Fourth Proportional to 23,171.69, 31,976.64 and 12,561.09

Step by Step Solution

1. Step 1: Write the proportion equation
   23,171.69 : 31,976.64 = 12,561.09 : x
2. Step 2: Convert to fraction form
   23,171.69/31,976.64 = 12,561.09/x
3. Step 3: Cross multiply
   23,171.69x = 31,976.64 × 12,561.09
4. Step 4: Simplify right side
   23,171.69x = 401,661,452.94
5. Step 5: Solve for x
   x = 401,661,452.94/23,171.69
6. Step 6: Final answer
   x = 17,334.15