Finding the Third Proportional to 72,721 and 151,668

Step by Step Solution

1. Step 1: Write the proportion equation
   72,721 : 151,668 = 151,668 : x
2. Step 2: Convert to fraction form
   72,721/151,668 = 151,668/x
3. Step 3: Cross multiply
   72,721x = 151,668 × 151,668
4. Step 4: Simplify right side
   72,721x = 23,003,182,224
5. Step 5: Solve for x
   x = 23,003,182,224/72,721
6. Step 6: Final answer
   x = 316,321.04