Finding the Third Proportional to 126,911 and 300,659

Step by Step Solution

1. Step 1: Write the proportion equation
   126,911 : 300,659 = 300,659 : x
2. Step 2: Convert to fraction form
   126,911/300,659 = 300,659/x
3. Step 3: Cross multiply
   126,911x = 300,659 × 300,659
4. Step 4: Simplify right side
   126,911x = 90,395,834,281
5. Step 5: Solve for x
   x = 90,395,834,281/126,911
6. Step 6: Final answer
   x = 712,277.38