Finding the Third Proportional to 39,830 and 59,720

Step by Step Solution

1. Step 1: Write the proportion equation
   39,830 : 59,720 = 59,720 : x
2. Step 2: Convert to fraction form
   39,830/59,720 = 59,720/x
3. Step 3: Cross multiply
   39,830x = 59,720 × 59,720
4. Step 4: Simplify right side
   39,830x = 3,566,478,400
5. Step 5: Solve for x
   x = 3,566,478,400/39,830
6. Step 6: Final answer
   x = 89,542.52