Finding the Third Proportional to 646,256 and 1,380,476

Step by Step Solution

1. Step 1: Write the proportion equation
   646,256 : 1,380,476 = 1,380,476 : x
2. Step 2: Convert to fraction form
   646,256/1,380,476 = 1,380,476/x
3. Step 3: Cross multiply
   646,256x = 1,380,476 × 1,380,476
4. Step 4: Simplify right side
   646,256x = 1,905,713,986,576
5. Step 5: Solve for x
   x = 1,905,713,986,576/646,256
6. Step 6: Final answer
   x = 2,948,853.07