Finding the Third Proportional to 132,721.50 and 288,768

Step by Step Solution

1. Step 1: Write the proportion equation
   132,721.50 : 288,768 = 288,768 : x
2. Step 2: Convert to fraction form
   132,721.50/288,768 = 288,768/x
3. Step 3: Cross multiply
   132,721.50x = 288,768 × 288,768
4. Step 4: Simplify right side
   132,721.50x = 83,386,957,824
5. Step 5: Solve for x
   x = 83,386,957,824/132,721.50
6. Step 6: Final answer
   x = 628,285.23