Finding the Third Proportional to 16,419 and 34,251

Step by Step Solution

1. Step 1: Write the proportion equation
   16,419 : 34,251 = 34,251 : x
2. Step 2: Convert to fraction form
   16,419/34,251 = 34,251/x
3. Step 3: Cross multiply
   16,419x = 34,251 × 34,251
4. Step 4: Simplify right side
   16,419x = 1,173,131,001
5. Step 5: Solve for x
   x = 1,173,131,001/16,419
6. Step 6: Final answer
   x = 71,449.60