Finding the Third Proportional to 476,856 and 668,410

Step by Step Solution

1. Step 1: Write the proportion equation
   476,856 : 668,410 = 668,410 : x
2. Step 2: Convert to fraction form
   476,856/668,410 = 668,410/x
3. Step 3: Cross multiply
   476,856x = 668,410 × 668,410
4. Step 4: Simplify right side
   476,856x = 446,771,928,100
5. Step 5: Solve for x
   x = 446,771,928,100/476,856
6. Step 6: Final answer
   x = 936,911.62