Finding the Third Proportional to 646,608 and 1,405,124

Step by Step Solution

1. Step 1: Write the proportion equation
   646,608 : 1,405,124 = 1,405,124 : x
2. Step 2: Convert to fraction form
   646,608/1,405,124 = 1,405,124/x
3. Step 3: Cross multiply
   646,608x = 1,405,124 × 1,405,124
4. Step 4: Simplify right side
   646,608x = 1,974,373,455,376
5. Step 5: Solve for x
   x = 1,974,373,455,376/646,608
6. Step 6: Final answer
   x = 3,053,431.84