Finding the Third Proportional to 21,148 and 31,517

Step by Step Solution

1. Step 1: Write the proportion equation
   21,148 : 31,517 = 31,517 : x
2. Step 2: Convert to fraction form
   21,148/31,517 = 31,517/x
3. Step 3: Cross multiply
   21,148x = 31,517 × 31,517
4. Step 4: Simplify right side
   21,148x = 993,321,289
5. Step 5: Solve for x
   x = 993,321,289/21,148
6. Step 6: Final answer
   x = 46,969.99