Finding the Third Proportional to 140,472 and 308,910

Step by Step Solution

1. Step 1: Write the proportion equation
   140,472 : 308,910 = 308,910 : x
2. Step 2: Convert to fraction form
   140,472/308,910 = 308,910/x
3. Step 3: Cross multiply
   140,472x = 308,910 × 308,910
4. Step 4: Simplify right side
   140,472x = 95,425,388,100
5. Step 5: Solve for x
   x = 95,425,388,100/140,472
6. Step 6: Final answer
   x = 679,319.64