Finding the Third Proportional to 263,028 and 406,818

Step by Step Solution

1. Step 1: Write the proportion equation
   263,028 : 406,818 = 406,818 : x
2. Step 2: Convert to fraction form
   263,028/406,818 = 406,818/x
3. Step 3: Cross multiply
   263,028x = 406,818 × 406,818
4. Step 4: Simplify right side
   263,028x = 165,500,885,124
5. Step 5: Solve for x
   x = 165,500,885,124/263,028
6. Step 6: Final answer
   x = 629,213.94