Finding the Third Proportional to 443,451 and 684,858

Step by Step Solution

1. Step 1: Write the proportion equation
   443,451 : 684,858 = 684,858 : x
2. Step 2: Convert to fraction form
   443,451/684,858 = 684,858/x
3. Step 3: Cross multiply
   443,451x = 684,858 × 684,858
4. Step 4: Simplify right side
   443,451x = 469,030,480,164
5. Step 5: Solve for x
   x = 469,030,480,164/443,451
6. Step 6: Final answer
   x = 1,057,682.77