Finding the Fourth Proportional to 23,164.38, 31,971.51 and 13,731.12

Step by Step Solution

1. Step 1: Write the proportion equation
   23,164.38 : 31,971.51 = 13,731.12 : x
2. Step 2: Convert to fraction form
   23,164.38/31,971.51 = 13,731.12/x
3. Step 3: Cross multiply
   23,164.38x = 31,971.51 × 13,731.12
4. Step 4: Simplify right side
   23,164.38x = 439,004,640.39
5. Step 5: Solve for x
   x = 439,004,640.39/23,164.38
6. Step 6: Final answer
   x = 18,951.71