Finding the Third Proportional to 16,781 and 34,290

Step by Step Solution

1. Step 1: Write the proportion equation
   16,781 : 34,290 = 34,290 : x
2. Step 2: Convert to fraction form
   16,781/34,290 = 34,290/x
3. Step 3: Cross multiply
   16,781x = 34,290 × 34,290
4. Step 4: Simplify right side
   16,781x = 1,175,804,100
5. Step 5: Solve for x
   x = 1,175,804,100/16,781
6. Step 6: Final answer
   x = 70,067.58