Finding the Third Proportional to 301,810 and 658,910

Step by Step Solution

1. Step 1: Write the proportion equation
   301,810 : 658,910 = 658,910 : x
2. Step 2: Convert to fraction form
   301,810/658,910 = 658,910/x
3. Step 3: Cross multiply
   301,810x = 658,910 × 658,910
4. Step 4: Simplify right side
   301,810x = 434,162,388,100
5. Step 5: Solve for x
   x = 434,162,388,100/301,810
6. Step 6: Final answer
   x = 1,438,528.84