Finding the Third Proportional to 404,265 and 820,409.25

Step by Step Solution

1. Step 1: Write the proportion equation
   404,265 : 820,409.25 = 820,409.25 : x
2. Step 2: Convert to fraction form
   404,265/820,409.25 = 820,409.25/x
3. Step 3: Cross multiply
   404,265x = 820,409.25 × 820,409.25
4. Step 4: Simplify right side
   404,265x = 673,071,337,485.56
5. Step 5: Solve for x
   x = 673,071,337,485.56/404,265
6. Step 6: Final answer
   x = 1,664,926.07