Finding the Third Proportional to 39,643 and 60,720

Step by Step Solution

1. Step 1: Write the proportion equation
   39,643 : 60,720 = 60,720 : x
2. Step 2: Convert to fraction form
   39,643/60,720 = 60,720/x
3. Step 3: Cross multiply
   39,643x = 60,720 × 60,720
4. Step 4: Simplify right side
   39,643x = 3,686,918,400
5. Step 5: Solve for x
   x = 3,686,918,400/39,643
6. Step 6: Final answer
   x = 93,003.01