Finding the Third Proportional to 30,889 and 62,870

Step by Step Solution

1. Step 1: Write the proportion equation
   30,889 : 62,870 = 62,870 : x
2. Step 2: Convert to fraction form
   30,889/62,870 = 62,870/x
3. Step 3: Cross multiply
   30,889x = 62,870 × 62,870
4. Step 4: Simplify right side
   30,889x = 3,952,636,900
5. Step 5: Solve for x
   x = 3,952,636,900/30,889
6. Step 6: Final answer
   x = 127,962.60