Finding the Third Proportional to 323,696 and 490,042

Step by Step Solution

1. Step 1: Write the proportion equation
   323,696 : 490,042 = 490,042 : x
2. Step 2: Convert to fraction form
   323,696/490,042 = 490,042/x
3. Step 3: Cross multiply
   323,696x = 490,042 × 490,042
4. Step 4: Simplify right side
   323,696x = 240,141,161,764
5. Step 5: Solve for x
   x = 240,141,161,764/323,696
6. Step 6: Final answer
   x = 741,872.50