Finding the Third Proportional to 1,448,469 and 2,128,329

Step by Step Solution

1. Step 1: Write the proportion equation
   1,448,469 : 2,128,329 = 2,128,329 : x
2. Step 2: Convert to fraction form
   1,448,469/2,128,329 = 2,128,329/x
3. Step 3: Cross multiply
   1,448,469x = 2,128,329 × 2,128,329
4. Step 4: Simplify right side
   1,448,469x = 4,529,784,332,241
5. Step 5: Solve for x
   x = 4,529,784,332,241/1,448,469
6. Step 6: Final answer
   x = 3,127,291.18