Finding the Third Proportional to 404,780 and 603,886

Step by Step Solution

1. Step 1: Write the proportion equation
   404,780 : 603,886 = 603,886 : x
2. Step 2: Convert to fraction form
   404,780/603,886 = 603,886/x
3. Step 3: Cross multiply
   404,780x = 603,886 × 603,886
4. Step 4: Simplify right side
   404,780x = 364,678,300,996
5. Step 5: Solve for x
   x = 364,678,300,996/404,780
6. Step 6: Final answer
   x = 900,929.64