Finding the Third Proportional to 16,400 and 33,472

Step by Step Solution

1. Step 1: Write the proportion equation
   16,400 : 33,472 = 33,472 : x
2. Step 2: Convert to fraction form
   16,400/33,472 = 33,472/x
3. Step 3: Cross multiply
   16,400x = 33,472 × 33,472
4. Step 4: Simplify right side
   16,400x = 1,120,374,784
5. Step 5: Solve for x
   x = 1,120,374,784/16,400
6. Step 6: Final answer
   x = 68,315.54