Finding the Third Proportional to 208,012 and 405,656

Step by Step Solution

1. Step 1: Write the proportion equation
   208,012 : 405,656 = 405,656 : x
2. Step 2: Convert to fraction form
   208,012/405,656 = 405,656/x
3. Step 3: Cross multiply
   208,012x = 405,656 × 405,656
4. Step 4: Simplify right side
   208,012x = 164,556,790,336
5. Step 5: Solve for x
   x = 164,556,790,336/208,012
6. Step 6: Final answer
   x = 791,092.78