Finding the Third Proportional to 16,420 and 34,008

Step by Step Solution

1. Step 1: Write the proportion equation
   16,420 : 34,008 = 34,008 : x
2. Step 2: Convert to fraction form
   16,420/34,008 = 34,008/x
3. Step 3: Cross multiply
   16,420x = 34,008 × 34,008
4. Step 4: Simplify right side
   16,420x = 1,156,544,064
5. Step 5: Solve for x
   x = 1,156,544,064/16,420
6. Step 6: Final answer
   x = 70,435.08