Finding the Third Proportional to 40,720 and 60,768

Step by Step Solution

1. Step 1: Write the proportion equation
   40,720 : 60,768 = 60,768 : x
2. Step 2: Convert to fraction form
   40,720/60,768 = 60,768/x
3. Step 3: Cross multiply
   40,720x = 60,768 × 60,768
4. Step 4: Simplify right side
   40,720x = 3,692,749,824
5. Step 5: Solve for x
   x = 3,692,749,824/40,720
6. Step 6: Final answer
   x = 90,686.39