Finding the Third Proportional to 394,165.50 and 864,636

Step by Step Solution

1. Step 1: Write the proportion equation
   394,165.50 : 864,636 = 864,636 : x
2. Step 2: Convert to fraction form
   394,165.50/864,636 = 864,636/x
3. Step 3: Cross multiply
   394,165.50x = 864,636 × 864,636
4. Step 4: Simplify right side
   394,165.50x = 747,595,412,496
5. Step 5: Solve for x
   x = 747,595,412,496/394,165.50
6. Step 6: Final answer
   x = 1,896,653.59