Finding the Third Proportional to 403,870 and 633,610

Step by Step Solution

1. Step 1: Write the proportion equation
   403,870 : 633,610 = 633,610 : x
2. Step 2: Convert to fraction form
   403,870/633,610 = 633,610/x
3. Step 3: Cross multiply
   403,870x = 633,610 × 633,610
4. Step 4: Simplify right side
   403,870x = 401,461,632,100
5. Step 5: Solve for x
   x = 401,461,632,100/403,870
6. Step 6: Final answer
   x = 994,036.77