Finding the Third Proportional to 646,128 and 1,324,494

Step by Step Solution

1. Step 1: Write the proportion equation
   646,128 : 1,324,494 = 1,324,494 : x
2. Step 2: Convert to fraction form
   646,128/1,324,494 = 1,324,494/x
3. Step 3: Cross multiply
   646,128x = 1,324,494 × 1,324,494
4. Step 4: Simplify right side
   646,128x = 1,754,284,356,036
5. Step 5: Solve for x
   x = 1,754,284,356,036/646,128
6. Step 6: Final answer
   x = 2,715,072.49