Finding the Fourth Proportional to 23,165.42, 31,968.15 and 12,555.05

Step by Step Solution

1. Step 1: Write the proportion equation
   23,165.42 : 31,968.15 = 12,555.05 : x
2. Step 2: Convert to fraction form
   23,165.42/31,968.15 = 12,555.05/x
3. Step 3: Cross multiply
   23,165.42x = 31,968.15 × 12,555.05
4. Step 4: Simplify right side
   23,165.42x = 401,361,721.66
5. Step 5: Solve for x
   x = 401,361,721.66/23,165.42
6. Step 6: Final answer
   x = 17,325.90