Finding the Third Proportional to 20,618 and 31,900

Step by Step Solution

1. Step 1: Write the proportion equation
   20,618 : 31,900 = 31,900 : x
2. Step 2: Convert to fraction form
   20,618/31,900 = 31,900/x
3. Step 3: Cross multiply
   20,618x = 31,900 × 31,900
4. Step 4: Simplify right side
   20,618x = 1,017,610,000
5. Step 5: Solve for x
   x = 1,017,610,000/20,618
6. Step 6: Final answer
   x = 49,355.42