Finding the Third Proportional to 393,676.50 and 857,355

Step by Step Solution

1. Step 1: Write the proportion equation
   393,676.50 : 857,355 = 857,355 : x
2. Step 2: Convert to fraction form
   393,676.50/857,355 = 857,355/x
3. Step 3: Cross multiply
   393,676.50x = 857,355 × 857,355
4. Step 4: Simplify right side
   393,676.50x = 735,057,596,025
5. Step 5: Solve for x
   x = 735,057,596,025/393,676.50
6. Step 6: Final answer
   x = 1,867,161.48