Finding the Third Proportional to 21,436 and 31,315

Step by Step Solution

1. Step 1: Write the proportion equation
   21,436 : 31,315 = 31,315 : x
2. Step 2: Convert to fraction form
   21,436/31,315 = 31,315/x
3. Step 3: Cross multiply
   21,436x = 31,315 × 31,315
4. Step 4: Simplify right side
   21,436x = 980,629,225
5. Step 5: Solve for x
   x = 980,629,225/21,436
6. Step 6: Final answer
   x = 45,746.84