Finding the Third Proportional to 2,690,853 and 4,170,780

Step by Step Solution

1. Step 1: Write the proportion equation
   2,690,853 : 4,170,780 = 4,170,780 : x
2. Step 2: Convert to fraction form
   2,690,853/4,170,780 = 4,170,780/x
3. Step 3: Cross multiply
   2,690,853x = 4,170,780 × 4,170,780
4. Step 4: Simplify right side
   2,690,853x = 17,395,405,808,400
5. Step 5: Solve for x
   x = 17,395,405,808,400/2,690,853
6. Step 6: Final answer
   x = 6,464,643.67