Finding the Third Proportional to 404,164 and 633,990

Step by Step Solution

1. Step 1: Write the proportion equation
   404,164 : 633,990 = 633,990 : x
2. Step 2: Convert to fraction form
   404,164/633,990 = 633,990/x
3. Step 3: Cross multiply
   404,164x = 633,990 × 633,990
4. Step 4: Simplify right side
   404,164x = 401,943,320,100
5. Step 5: Solve for x
   x = 401,943,320,100/404,164
6. Step 6: Final answer
   x = 994,505.50