Finding the Third Proportional to 21,354 and 31,208

Step by Step Solution

1. Step 1: Write the proportion equation
   21,354 : 31,208 = 31,208 : x
2. Step 2: Convert to fraction form
   21,354/31,208 = 31,208/x
3. Step 3: Cross multiply
   21,354x = 31,208 × 31,208
4. Step 4: Simplify right side
   21,354x = 973,939,264
5. Step 5: Solve for x
   x = 973,939,264/21,354
6. Step 6: Final answer
   x = 45,609.22