Finding the Third Proportional to 20,124 and 28,315

Step by Step Solution

1. Step 1: Write the proportion equation
   20,124 : 28,315 = 28,315 : x
2. Step 2: Convert to fraction form
   20,124/28,315 = 28,315/x
3. Step 3: Cross multiply
   20,124x = 28,315 × 28,315
4. Step 4: Simplify right side
   20,124x = 801,739,225
5. Step 5: Solve for x
   x = 801,739,225/20,124
6. Step 6: Final answer
   x = 39,839.95