Finding the Third Proportional to 316,756 and 659,630

Step by Step Solution

1. Step 1: Write the proportion equation
   316,756 : 659,630 = 659,630 : x
2. Step 2: Convert to fraction form
   316,756/659,630 = 659,630/x
3. Step 3: Cross multiply
   316,756x = 659,630 × 659,630
4. Step 4: Simplify right side
   316,756x = 435,111,736,900
5. Step 5: Solve for x
   x = 435,111,736,900/316,756
6. Step 6: Final answer
   x = 1,373,649.55