Finding the Third Proportional to 15,321 and 31,287

Step by Step Solution

1. Step 1: Write the proportion equation
   15,321 : 31,287 = 31,287 : x
2. Step 2: Convert to fraction form
   15,321/31,287 = 31,287/x
3. Step 3: Cross multiply
   15,321x = 31,287 × 31,287
4. Step 4: Simplify right side
   15,321x = 978,876,369
5. Step 5: Solve for x
   x = 978,876,369/15,321
6. Step 6: Final answer
   x = 63,891.15