Finding the Third Proportional to 395,508 and 819,054.75

Step by Step Solution

1. Step 1: Write the proportion equation
   395,508 : 819,054.75 = 819,054.75 : x
2. Step 2: Convert to fraction form
   395,508/819,054.75 = 819,054.75/x
3. Step 3: Cross multiply
   395,508x = 819,054.75 × 819,054.75
4. Step 4: Simplify right side
   395,508x = 670,850,683,497.56
5. Step 5: Solve for x
   x = 670,850,683,497.56/395,508
6. Step 6: Final answer
   x = 1,696,174.75