Finding the Third Proportional to 411,993 and 636,653.25

Step by Step Solution

1. Step 1: Write the proportion equation
   411,993 : 636,653.25 = 636,653.25 : x
2. Step 2: Convert to fraction form
   411,993/636,653.25 = 636,653.25/x
3. Step 3: Cross multiply
   411,993x = 636,653.25 × 636,653.25
4. Step 4: Simplify right side
   411,993x = 405,327,360,735.56
5. Step 5: Solve for x
   x = 405,327,360,735.56/411,993
6. Step 6: Final answer
   x = 983,820.99