Finding the Third Proportional to 20,620 and 31,340

Step by Step Solution

1. Step 1: Write the proportion equation
   20,620 : 31,340 = 31,340 : x
2. Step 2: Convert to fraction form
   20,620/31,340 = 31,340/x
3. Step 3: Cross multiply
   20,620x = 31,340 × 31,340
4. Step 4: Simplify right side
   20,620x = 982,195,600
5. Step 5: Solve for x
   x = 982,195,600/20,620
6. Step 6: Final answer
   x = 47,633.15