Finding the Third Proportional to 395,513 and 819,064

Step by Step Solution

1. Step 1: Write the proportion equation
   395,513 : 819,064 = 819,064 : x
2. Step 2: Convert to fraction form
   395,513/819,064 = 819,064/x
3. Step 3: Cross multiply
   395,513x = 819,064 × 819,064
4. Step 4: Simplify right side
   395,513x = 670,865,836,096
5. Step 5: Solve for x
   x = 670,865,836,096/395,513
6. Step 6: Final answer
   x = 1,696,191.62