Finding the Third Proportional to 156,667 and 321,630

Step by Step Solution

1. Step 1: Write the proportion equation
   156,667 : 321,630 = 321,630 : x
2. Step 2: Convert to fraction form
   156,667/321,630 = 321,630/x
3. Step 3: Cross multiply
   156,667x = 321,630 × 321,630
4. Step 4: Simplify right side
   156,667x = 103,445,856,900
5. Step 5: Solve for x
   x = 103,445,856,900/156,667
6. Step 6: Final answer
   x = 660,291.30