Finding the Third Proportional to 30,418 and 65,039

Step by Step Solution

1. Step 1: Write the proportion equation
   30,418 : 65,039 = 65,039 : x
2. Step 2: Convert to fraction form
   30,418/65,039 = 65,039/x
3. Step 3: Cross multiply
   30,418x = 65,039 × 65,039
4. Step 4: Simplify right side
   30,418x = 4,230,071,521
5. Step 5: Solve for x
   x = 4,230,071,521/30,418
6. Step 6: Final answer
   x = 139,064.75