Finding the Third Proportional to 21,691.50 and 23,959.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,691.50 : 23,959.50 = 23,959.50 : x
2. Step 2: Convert to fraction form
   21,691.50/23,959.50 = 23,959.50/x
3. Step 3: Cross multiply
   21,691.50x = 23,959.50 × 23,959.50
4. Step 4: Simplify right side
   21,691.50x = 574,057,640.25
5. Step 5: Solve for x
   x = 574,057,640.25/21,691.50
6. Step 6: Final answer
   x = 26,464.64