Finding the Third Proportional to 16,986 and 34,430

Step by Step Solution

1. Step 1: Write the proportion equation
   16,986 : 34,430 = 34,430 : x
2. Step 2: Convert to fraction form
   16,986/34,430 = 34,430/x
3. Step 3: Cross multiply
   16,986x = 34,430 × 34,430
4. Step 4: Simplify right side
   16,986x = 1,185,424,900
5. Step 5: Solve for x
   x = 1,185,424,900/16,986
6. Step 6: Final answer
   x = 69,788.35