Finding the Third Proportional to 1,584,638 and 3,415,678

Step by Step Solution

1. Step 1: Write the proportion equation
   1,584,638 : 3,415,678 = 3,415,678 : x
2. Step 2: Convert to fraction form
   1,584,638/3,415,678 = 3,415,678/x
3. Step 3: Cross multiply
   1,584,638x = 3,415,678 × 3,415,678
4. Step 4: Simplify right side
   1,584,638x = 11,666,856,199,684
5. Step 5: Solve for x
   x = 11,666,856,199,684/1,584,638
6. Step 6: Final answer
   x = 7,362,474.08