Finding the Third Proportional to 1,407,198 and 3,318,570

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407,198 : 3,318,570 = 3,318,570 : x
2. Step 2: Convert to fraction form
   1,407,198/3,318,570 = 3,318,570/x
3. Step 3: Cross multiply
   1,407,198x = 3,318,570 × 3,318,570
4. Step 4: Simplify right side
   1,407,198x = 11,012,906,844,900
5. Step 5: Solve for x
   x = 11,012,906,844,900/1,407,198
6. Step 6: Final answer
   x = 7,826,124.57