Finding the Third Proportional to 215,042 and 300,764

Step by Step Solution

1. Step 1: Write the proportion equation
   215,042 : 300,764 = 300,764 : x
2. Step 2: Convert to fraction form
   215,042/300,764 = 300,764/x
3. Step 3: Cross multiply
   215,042x = 300,764 × 300,764
4. Step 4: Simplify right side
   215,042x = 90,458,983,696
5. Step 5: Solve for x
   x = 90,458,983,696/215,042
6. Step 6: Final answer
   x = 420,657.28