Finding the Third Proportional to 407,870 and 874,770

Step by Step Solution

1. Step 1: Write the proportion equation
   407,870 : 874,770 = 874,770 : x
2. Step 2: Convert to fraction form
   407,870/874,770 = 874,770/x
3. Step 3: Cross multiply
   407,870x = 874,770 × 874,770
4. Step 4: Simplify right side
   407,870x = 765,222,552,900
5. Step 5: Solve for x
   x = 765,222,552,900/407,870
6. Step 6: Final answer
   x = 1,876,143.26