Finding the Third Proportional to 140,242 and 308,530

Step by Step Solution

1. Step 1: Write the proportion equation
   140,242 : 308,530 = 308,530 : x
2. Step 2: Convert to fraction form
   140,242/308,530 = 308,530/x
3. Step 3: Cross multiply
   140,242x = 308,530 × 308,530
4. Step 4: Simplify right side
   140,242x = 95,190,760,900
5. Step 5: Solve for x
   x = 95,190,760,900/140,242
6. Step 6: Final answer
   x = 678,760.72