Finding the Third Proportional to 1,392,228 and 2,215,328

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392,228 : 2,215,328 = 2,215,328 : x
2. Step 2: Convert to fraction form
   1,392,228/2,215,328 = 2,215,328/x
3. Step 3: Cross multiply
   1,392,228x = 2,215,328 × 2,215,328
4. Step 4: Simplify right side
   1,392,228x = 4,907,678,147,584
5. Step 5: Solve for x
   x = 4,907,678,147,584/1,392,228
6. Step 6: Final answer
   x = 3,525,053.47