Finding the Third Proportional to 21,433.50 and 31,311

Step by Step Solution

1. Step 1: Write the proportion equation
   21,433.50 : 31,311 = 31,311 : x
2. Step 2: Convert to fraction form
   21,433.50/31,311 = 31,311/x
3. Step 3: Cross multiply
   21,433.50x = 31,311 × 31,311
4. Step 4: Simplify right side
   21,433.50x = 980,378,721
5. Step 5: Solve for x
   x = 980,378,721/21,433.50
6. Step 6: Final answer
   x = 45,740.49