Finding the Third Proportional to 20,680 and 30,572

Step by Step Solution

1. Step 1: Write the proportion equation
   20,680 : 30,572 = 30,572 : x
2. Step 2: Convert to fraction form
   20,680/30,572 = 30,572/x
3. Step 3: Cross multiply
   20,680x = 30,572 × 30,572
4. Step 4: Simplify right side
   20,680x = 934,647,184
5. Step 5: Solve for x
   x = 934,647,184/20,680
6. Step 6: Final answer
   x = 45,195.71