Finding the Third Proportional to 314,691 and 673,878

Step by Step Solution

1. Step 1: Write the proportion equation
   314,691 : 673,878 = 673,878 : x
2. Step 2: Convert to fraction form
   314,691/673,878 = 673,878/x
3. Step 3: Cross multiply
   314,691x = 673,878 × 673,878
4. Step 4: Simplify right side
   314,691x = 454,111,558,884
5. Step 5: Solve for x
   x = 454,111,558,884/314,691
6. Step 6: Final answer
   x = 1,443,039.55