Finding the Fourth Proportional to 23,171.72, 31,977.12 and 12,561.44

Step by Step Solution

1. Step 1: Write the proportion equation
   23,171.72 : 31,977.12 = 12,561.44 : x
2. Step 2: Convert to fraction form
   23,171.72/31,977.12 = 12,561.44/x
3. Step 3: Cross multiply
   23,171.72x = 31,977.12 × 12,561.44
4. Step 4: Simplify right side
   23,171.72x = 401,678,514.37
5. Step 5: Solve for x
   x = 401,678,514.37/23,171.72
6. Step 6: Final answer
   x = 17,334.86