Finding the Third Proportional to 320,616 and 500,334

Step by Step Solution

1. Step 1: Write the proportion equation
   320,616 : 500,334 = 500,334 : x
2. Step 2: Convert to fraction form
   320,616/500,334 = 500,334/x
3. Step 3: Cross multiply
   320,616x = 500,334 × 500,334
4. Step 4: Simplify right side
   320,616x = 250,334,111,556
5. Step 5: Solve for x
   x = 250,334,111,556/320,616
6. Step 6: Final answer
   x = 780,791.08