Finding the Third Proportional to 1,392,170 and 2,215,238

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392,170 : 2,215,238 = 2,215,238 : x
2. Step 2: Convert to fraction form
   1,392,170/2,215,238 = 2,215,238/x
3. Step 3: Cross multiply
   1,392,170x = 2,215,238 × 2,215,238
4. Step 4: Simplify right side
   1,392,170x = 4,907,279,396,644
5. Step 5: Solve for x
   x = 4,907,279,396,644/1,392,170
6. Step 6: Final answer
   x = 3,524,913.91