Finding the Third Proportional to 21,008 and 31,242

Step by Step Solution

1. Step 1: Write the proportion equation
   21,008 : 31,242 = 31,242 : x
2. Step 2: Convert to fraction form
   21,008/31,242 = 31,242/x
3. Step 3: Cross multiply
   21,008x = 31,242 × 31,242
4. Step 4: Simplify right side
   21,008x = 976,062,564
5. Step 5: Solve for x
   x = 976,062,564/21,008
6. Step 6: Final answer
   x = 46,461.47