Finding the Third Proportional to 1,448,439 and 2,128,323

Step by Step Solution

1. Step 1: Write the proportion equation
   1,448,439 : 2,128,323 = 2,128,323 : x
2. Step 2: Convert to fraction form
   1,448,439/2,128,323 = 2,128,323/x
3. Step 3: Cross multiply
   1,448,439x = 2,128,323 × 2,128,323
4. Step 4: Simplify right side
   1,448,439x = 4,529,758,792,329
5. Step 5: Solve for x
   x = 4,529,758,792,329/1,448,439
6. Step 6: Final answer
   x = 3,127,338.32