Finding the Fourth Proportional to 23,171.48, 31,976.81 and 12,561.11

Step by Step Solution

1. Step 1: Write the proportion equation
   23,171.48 : 31,976.81 = 12,561.11 : x
2. Step 2: Convert to fraction form
   23,171.48/31,976.81 = 12,561.11/x
3. Step 3: Cross multiply
   23,171.48x = 31,976.81 × 12,561.11
4. Step 4: Simplify right side
   23,171.48x = 401,664,227.86
5. Step 5: Solve for x
   x = 401,664,227.86/23,171.48
6. Step 6: Final answer
   x = 17,334.42