Finding the Third Proportional to 20,520 and 31,398

Step by Step Solution

1. Step 1: Write the proportion equation
   20,520 : 31,398 = 31,398 : x
2. Step 2: Convert to fraction form
   20,520/31,398 = 31,398/x
3. Step 3: Cross multiply
   20,520x = 31,398 × 31,398
4. Step 4: Simplify right side
   20,520x = 985,834,404
5. Step 5: Solve for x
   x = 985,834,404/20,520
6. Step 6: Final answer
   x = 48,042.61