Finding the Third Proportional to 16,689 and 31,276

Step by Step Solution

1. Step 1: Write the proportion equation
   16,689 : 31,276 = 31,276 : x
2. Step 2: Convert to fraction form
   16,689/31,276 = 31,276/x
3. Step 3: Cross multiply
   16,689x = 31,276 × 31,276
4. Step 4: Simplify right side
   16,689x = 978,188,176
5. Step 5: Solve for x
   x = 978,188,176/16,689
6. Step 6: Final answer
   x = 58,612.75