Finding the Third Proportional to 646,612 and 1,405,132

Step by Step Solution

1. Step 1: Write the proportion equation
   646,612 : 1,405,132 = 1,405,132 : x
2. Step 2: Convert to fraction form
   646,612/1,405,132 = 1,405,132/x
3. Step 3: Cross multiply
   646,612x = 1,405,132 × 1,405,132
4. Step 4: Simplify right side
   646,612x = 1,974,395,937,424
5. Step 5: Solve for x
   x = 1,974,395,937,424/646,612
6. Step 6: Final answer
   x = 3,053,447.72