Finding the Third Proportional to 646,620 and 1,405,162

Step by Step Solution

1. Step 1: Write the proportion equation
   646,620 : 1,405,162 = 1,405,162 : x
2. Step 2: Convert to fraction form
   646,620/1,405,162 = 1,405,162/x
3. Step 3: Cross multiply
   646,620x = 1,405,162 × 1,405,162
4. Step 4: Simplify right side
   646,620x = 1,974,480,246,244
5. Step 5: Solve for x
   x = 1,974,480,246,244/646,620
6. Step 6: Final answer
   x = 3,053,540.33