Finding the Third Proportional to 98,666 and 139,605

Step by Step Solution

1. Step 1: Write the proportion equation
   98,666 : 139,605 = 139,605 : x
2. Step 2: Convert to fraction form
   98,666/139,605 = 139,605/x
3. Step 3: Cross multiply
   98,666x = 139,605 × 139,605
4. Step 4: Simplify right side
   98,666x = 19,489,556,025
5. Step 5: Solve for x
   x = 19,489,556,025/98,666
6. Step 6: Final answer
   x = 197,530.62