Finding the Third Proportional to 42,770 and 62,211

Step by Step Solution

1. Step 1: Write the proportion equation
   42,770 : 62,211 = 62,211 : x
2. Step 2: Convert to fraction form
   42,770/62,211 = 62,211/x
3. Step 3: Cross multiply
   42,770x = 62,211 × 62,211
4. Step 4: Simplify right side
   42,770x = 3,870,208,521
5. Step 5: Solve for x
   x = 3,870,208,521/42,770
6. Step 6: Final answer
   x = 90,488.86