Finding the Third Proportional to 21,792 and 25,345.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,792 : 25,345.50 = 25,345.50 : x
2. Step 2: Convert to fraction form
   21,792/25,345.50 = 25,345.50/x
3. Step 3: Cross multiply
   21,792x = 25,345.50 × 25,345.50
4. Step 4: Simplify right side
   21,792x = 642,394,370.25
5. Step 5: Solve for x
   x = 642,394,370.25/21,792
6. Step 6: Final answer
   x = 29,478.45