Finding the Third Proportional to 215,039 and 300,762

Step by Step Solution

1. Step 1: Write the proportion equation
   215,039 : 300,762 = 300,762 : x
2. Step 2: Convert to fraction form
   215,039/300,762 = 300,762/x
3. Step 3: Cross multiply
   215,039x = 300,762 × 300,762
4. Step 4: Simplify right side
   215,039x = 90,457,780,644
5. Step 5: Solve for x
   x = 90,457,780,644/215,039
6. Step 6: Final answer
   x = 420,657.56