Finding the Third Proportional to 1,071,638 and 1,455,405

Step by Step Solution

1. Step 1: Write the proportion equation
   1,071,638 : 1,455,405 = 1,455,405 : x
2. Step 2: Convert to fraction form
   1,071,638/1,455,405 = 1,455,405/x
3. Step 3: Cross multiply
   1,071,638x = 1,455,405 × 1,455,405
4. Step 4: Simplify right side
   1,071,638x = 2,118,203,714,025
5. Step 5: Solve for x
   x = 2,118,203,714,025/1,071,638
6. Step 6: Final answer
   x = 1,976,603.77