Finding the Third Proportional to 140,239 and 308,524

Step by Step Solution

1. Step 1: Write the proportion equation
   140,239 : 308,524 = 308,524 : x
2. Step 2: Convert to fraction form
   140,239/308,524 = 308,524/x
3. Step 3: Cross multiply
   140,239x = 308,524 × 308,524
4. Step 4: Simplify right side
   140,239x = 95,187,058,576
5. Step 5: Solve for x
   x = 95,187,058,576/140,239
6. Step 6: Final answer
   x = 678,748.84