Finding the Third Proportional to 443,446 and 685,117

Step by Step Solution

1. Step 1: Write the proportion equation
   443,446 : 685,117 = 685,117 : x
2. Step 2: Convert to fraction form
   443,446/685,117 = 685,117/x
3. Step 3: Cross multiply
   443,446x = 685,117 × 685,117
4. Step 4: Simplify right side
   443,446x = 469,385,303,689
5. Step 5: Solve for x
   x = 469,385,303,689/443,446
6. Step 6: Final answer
   x = 1,058,494.84