Finding the Third Proportional to 1,396,424 and 2,135,216

Step by Step Solution

1. Step 1: Write the proportion equation
   1,396,424 : 2,135,216 = 2,135,216 : x
2. Step 2: Convert to fraction form
   1,396,424/2,135,216 = 2,135,216/x
3. Step 3: Cross multiply
   1,396,424x = 2,135,216 × 2,135,216
4. Step 4: Simplify right side
   1,396,424x = 4,559,147,366,656
5. Step 5: Solve for x
   x = 4,559,147,366,656/1,396,424
6. Step 6: Final answer
   x = 3,264,873.25