Finding the Fourth Proportional to 23,171.52, 31,976.40 and 12,561.12

Step by Step Solution

1. Step 1: Write the proportion equation
   23,171.52 : 31,976.40 = 12,561.12 : x
2. Step 2: Convert to fraction form
   23,171.52/31,976.40 = 12,561.12/x
3. Step 3: Cross multiply
   23,171.52x = 31,976.40 × 12,561.12
4. Step 4: Simplify right side
   23,171.52x = 401,659,397.57
5. Step 5: Solve for x
   x = 401,659,397.57/23,171.52
6. Step 6: Final answer
   x = 17,334.18