Finding the Third Proportional to 646,615 and 1,405,150

Step by Step Solution

1. Step 1: Write the proportion equation
   646,615 : 1,405,150 = 1,405,150 : x
2. Step 2: Convert to fraction form
   646,615/1,405,150 = 1,405,150/x
3. Step 3: Cross multiply
   646,615x = 1,405,150 × 1,405,150
4. Step 4: Simplify right side
   646,615x = 1,974,446,522,500
5. Step 5: Solve for x
   x = 1,974,446,522,500/646,615
6. Step 6: Final answer
   x = 3,053,511.78