Finding the Third Proportional to 21,354 and 31,913

Step by Step Solution

1. Step 1: Write the proportion equation
   21,354 : 31,913 = 31,913 : x
2. Step 2: Convert to fraction form
   21,354/31,913 = 31,913/x
3. Step 3: Cross multiply
   21,354x = 31,913 × 31,913
4. Step 4: Simplify right side
   21,354x = 1,018,439,569
5. Step 5: Solve for x
   x = 1,018,439,569/21,354
6. Step 6: Final answer
   x = 47,693.15