Finding the Third Proportional to 21,264 and 31,272

Step by Step Solution

1. Step 1: Write the proportion equation
   21,264 : 31,272 = 31,272 : x
2. Step 2: Convert to fraction form
   21,264/31,272 = 31,272/x
3. Step 3: Cross multiply
   21,264x = 31,272 × 31,272
4. Step 4: Simplify right side
   21,264x = 977,937,984
5. Step 5: Solve for x
   x = 977,937,984/21,264
6. Step 6: Final answer
   x = 45,990.31