Finding the Third Proportional to 21,384 and 31,292

Step by Step Solution

1. Step 1: Write the proportion equation
   21,384 : 31,292 = 31,292 : x
2. Step 2: Convert to fraction form
   21,384/31,292 = 31,292/x
3. Step 3: Cross multiply
   21,384x = 31,292 × 31,292
4. Step 4: Simplify right side
   21,384x = 979,189,264
5. Step 5: Solve for x
   x = 979,189,264/21,384
6. Step 6: Final answer
   x = 45,790.74