Finding the Third Proportional to 1,420,992 and 2,160,648

Step by Step Solution

1. Step 1: Write the proportion equation
   1,420,992 : 2,160,648 = 2,160,648 : x
2. Step 2: Convert to fraction form
   1,420,992/2,160,648 = 2,160,648/x
3. Step 3: Cross multiply
   1,420,992x = 2,160,648 × 2,160,648
4. Step 4: Simplify right side
   1,420,992x = 4,668,399,779,904
5. Step 5: Solve for x
   x = 4,668,399,779,904/1,420,992
6. Step 6: Final answer
   x = 3,285,310.39