Finding the Third Proportional to 20,499 and 31,553

Step by Step Solution

1. Step 1: Write the proportion equation
   20,499 : 31,553 = 31,553 : x
2. Step 2: Convert to fraction form
   20,499/31,553 = 31,553/x
3. Step 3: Cross multiply
   20,499x = 31,553 × 31,553
4. Step 4: Simplify right side
   20,499x = 995,591,809
5. Step 5: Solve for x
   x = 995,591,809/20,499
6. Step 6: Final answer
   x = 48,567.82