Finding the Third Proportional to 16,915 and 34,478

Step by Step Solution

1. Step 1: Write the proportion equation
   16,915 : 34,478 = 34,478 : x
2. Step 2: Convert to fraction form
   16,915/34,478 = 34,478/x
3. Step 3: Cross multiply
   16,915x = 34,478 × 34,478
4. Step 4: Simplify right side
   16,915x = 1,188,732,484
5. Step 5: Solve for x
   x = 1,188,732,484/16,915
6. Step 6: Final answer
   x = 70,276.82