Finding the Third Proportional to 17,620 and 20,718

Step by Step Solution

1. Step 1: Write the proportion equation
   17,620 : 20,718 = 20,718 : x
2. Step 2: Convert to fraction form
   17,620/20,718 = 20,718/x
3. Step 3: Cross multiply
   17,620x = 20,718 × 20,718
4. Step 4: Simplify right side
   17,620x = 429,235,524
5. Step 5: Solve for x
   x = 429,235,524/17,620
6. Step 6: Final answer
   x = 24,360.70