Finding the Fourth Proportional to 23,165.91, 31,969.11 and 12,555.72

Step by Step Solution

1. Step 1: Write the proportion equation
   23,165.91 : 31,969.11 = 12,555.72 : x
2. Step 2: Convert to fraction form
   23,165.91/31,969.11 = 12,555.72/x
3. Step 3: Cross multiply
   23,165.91x = 31,969.11 × 12,555.72
4. Step 4: Simplify right side
   23,165.91x = 401,395,240.89
5. Step 5: Solve for x
   x = 401,395,240.89/23,165.91
6. Step 6: Final answer
   x = 17,326.98