Finding the Third Proportional to 21,309 and 45,690

Step by Step Solution

1. Step 1: Write the proportion equation
   21,309 : 45,690 = 45,690 : x
2. Step 2: Convert to fraction form
   21,309/45,690 = 45,690/x
3. Step 3: Cross multiply
   21,309x = 45,690 × 45,690
4. Step 4: Simplify right side
   21,309x = 2,087,576,100
5. Step 5: Solve for x
   x = 2,087,576,100/21,309
6. Step 6: Final answer
   x = 97,966.87