Finding the Third Proportional to 315,664 and 760,728

Step by Step Solution

1. Step 1: Write the proportion equation
   315,664 : 760,728 = 760,728 : x
2. Step 2: Convert to fraction form
   315,664/760,728 = 760,728/x
3. Step 3: Cross multiply
   315,664x = 760,728 × 760,728
4. Step 4: Simplify right side
   315,664x = 578,707,089,984
5. Step 5: Solve for x
   x = 578,707,089,984/315,664
6. Step 6: Final answer
   x = 1,833,300.88