Finding the Third Proportional to 308,648 and 674,968

Step by Step Solution

1. Step 1: Write the proportion equation
   308,648 : 674,968 = 674,968 : x
2. Step 2: Convert to fraction form
   308,648/674,968 = 674,968/x
3. Step 3: Cross multiply
   308,648x = 674,968 × 674,968
4. Step 4: Simplify right side
   308,648x = 455,581,801,024
5. Step 5: Solve for x
   x = 455,581,801,024/308,648
6. Step 6: Final answer
   x = 1,476,056.22