Finding the Third Proportional to 21,384 and 51,451.45

Step by Step Solution

1. Step 1: Write the proportion equation
   21,384 : 51,451.45 = 51,451.45 : x
2. Step 2: Convert to fraction form
   21,384/51,451.45 = 51,451.45/x
3. Step 3: Cross multiply
   21,384x = 51,451.45 × 51,451.45
4. Step 4: Simplify right side
   21,384x = 2,647,252,028.67
5. Step 5: Solve for x
   x = 2,647,252,028.67/21,384
6. Step 6: Final answer
   x = 123,795.92