Finding the Third Proportional to 406,510 and 603,870

Step by Step Solution

1. Step 1: Write the proportion equation
   406,510 : 603,870 = 603,870 : x
2. Step 2: Convert to fraction form
   406,510/603,870 = 603,870/x
3. Step 3: Cross multiply
   406,510x = 603,870 × 603,870
4. Step 4: Simplify right side
   406,510x = 364,658,976,900
5. Step 5: Solve for x
   x = 364,658,976,900/406,510
6. Step 6: Final answer
   x = 897,047.99