Finding the Third Proportional to 21,308 and 31,305

Step by Step Solution

1. Step 1: Write the proportion equation
   21,308 : 31,305 = 31,305 : x
2. Step 2: Convert to fraction form
   21,308/31,305 = 31,305/x
3. Step 3: Cross multiply
   21,308x = 31,305 × 31,305
4. Step 4: Simplify right side
   21,308x = 980,003,025
5. Step 5: Solve for x
   x = 980,003,025/21,308
6. Step 6: Final answer
   x = 45,992.26