Finding the Fourth Proportional to 23,167.50, 31,973.31 and 13,231.50

Step by Step Solution

1. Step 1: Write the proportion equation
   23,167.50 : 31,973.31 = 13,231.50 : x
2. Step 2: Convert to fraction form
   23,167.50/31,973.31 = 13,231.50/x
3. Step 3: Cross multiply
   23,167.50x = 31,973.31 × 13,231.50
4. Step 4: Simplify right side
   23,167.50x = 423,054,851.27
5. Step 5: Solve for x
   x = 423,054,851.27/23,167.50
6. Step 6: Final answer
   x = 18,260.70