Finding the Third Proportional to 126,909 and 300,654

Step by Step Solution

1. Step 1: Write the proportion equation
   126,909 : 300,654 = 300,654 : x
2. Step 2: Convert to fraction form
   126,909/300,654 = 300,654/x
3. Step 3: Cross multiply
   126,909x = 300,654 × 300,654
4. Step 4: Simplify right side
   126,909x = 90,392,827,716
5. Step 5: Solve for x
   x = 90,392,827,716/126,909
6. Step 6: Final answer
   x = 712,264.91