Finding the Third Proportional to 646,614 and 1,405,148

Step by Step Solution

1. Step 1: Write the proportion equation
   646,614 : 1,405,148 = 1,405,148 : x
2. Step 2: Convert to fraction form
   646,614/1,405,148 = 1,405,148/x
3. Step 3: Cross multiply
   646,614x = 1,405,148 × 1,405,148
4. Step 4: Simplify right side
   646,614x = 1,974,440,901,904
5. Step 5: Solve for x
   x = 1,974,440,901,904/646,614
6. Step 6: Final answer
   x = 3,053,507.81