Finding the Third Proportional to 39,992 and 86,608

Step by Step Solution

1. Step 1: Write the proportion equation
   39,992 : 86,608 = 86,608 : x
2. Step 2: Convert to fraction form
   39,992/86,608 = 86,608/x
3. Step 3: Cross multiply
   39,992x = 86,608 × 86,608
4. Step 4: Simplify right side
   39,992x = 7,500,945,664
5. Step 5: Solve for x
   x = 7,500,945,664/39,992
6. Step 6: Final answer
   x = 187,561.15