Finding the Third Proportional to 21,392 and 31,116

Step by Step Solution

1. Step 1: Write the proportion equation
   21,392 : 31,116 = 31,116 : x
2. Step 2: Convert to fraction form
   21,392/31,116 = 31,116/x
3. Step 3: Cross multiply
   21,392x = 31,116 × 31,116
4. Step 4: Simplify right side
   21,392x = 968,205,456
5. Step 5: Solve for x
   x = 968,205,456/21,392
6. Step 6: Final answer
   x = 45,260.17