Finding the Third Proportional to 1,407,216 and 3,318,608

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407,216 : 3,318,608 = 3,318,608 : x
2. Step 2: Convert to fraction form
   1,407,216/3,318,608 = 3,318,608/x
3. Step 3: Cross multiply
   1,407,216x = 3,318,608 × 3,318,608
4. Step 4: Simplify right side
   1,407,216x = 11,013,159,057,664
5. Step 5: Solve for x
   x = 11,013,159,057,664/1,407,216
6. Step 6: Final answer
   x = 7,826,203.69