Finding the Third Proportional to 394,092.50 and 819,636

Step by Step Solution

1. Step 1: Write the proportion equation
   394,092.50 : 819,636 = 819,636 : x
2. Step 2: Convert to fraction form
   394,092.50/819,636 = 819,636/x
3. Step 3: Cross multiply
   394,092.50x = 819,636 × 819,636
4. Step 4: Simplify right side
   394,092.50x = 671,803,172,496
5. Step 5: Solve for x
   x = 671,803,172,496/394,092.50
6. Step 6: Final answer
   x = 1,704,683.98