Finding the Fourth Proportional to 23,165.40, 31,968.24 and 12,555

Step by Step Solution

1. Step 1: Write the proportion equation
   23,165.40 : 31,968.24 = 12,555 : x
2. Step 2: Convert to fraction form
   23,165.40/31,968.24 = 12,555/x
3. Step 3: Cross multiply
   23,165.40x = 31,968.24 × 12,555
4. Step 4: Simplify right side
   23,165.40x = 401,361,253.20
5. Step 5: Solve for x
   x = 401,361,253.20/23,165.40
6. Step 6: Final answer
   x = 17,325.89