Finding the Third Proportional to 20,431 and 31,025

Step by Step Solution

1. Step 1: Write the proportion equation
   20,431 : 31,025 = 31,025 : x
2. Step 2: Convert to fraction form
   20,431/31,025 = 31,025/x
3. Step 3: Cross multiply
   20,431x = 31,025 × 31,025
4. Step 4: Simplify right side
   20,431x = 962,550,625
5. Step 5: Solve for x
   x = 962,550,625/20,431
6. Step 6: Final answer
   x = 47,112.26