Finding the Third Proportional to 1,404,455 and 2,121,440

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404,455 : 2,121,440 = 2,121,440 : x
2. Step 2: Convert to fraction form
   1,404,455/2,121,440 = 2,121,440/x
3. Step 3: Cross multiply
   1,404,455x = 2,121,440 × 2,121,440
4. Step 4: Simplify right side
   1,404,455x = 4,500,507,673,600
5. Step 5: Solve for x
   x = 4,500,507,673,600/1,404,455
6. Step 6: Final answer
   x = 3,204,451.32