Finding the Third Proportional to 1,678,608 and 2,662,072

Step by Step Solution

1. Step 1: Write the proportion equation
   1,678,608 : 2,662,072 = 2,662,072 : x
2. Step 2: Convert to fraction form
   1,678,608/2,662,072 = 2,662,072/x
3. Step 3: Cross multiply
   1,678,608x = 2,662,072 × 2,662,072
4. Step 4: Simplify right side
   1,678,608x = 7,086,627,333,184
5. Step 5: Solve for x
   x = 7,086,627,333,184/1,678,608
6. Step 6: Final answer
   x = 4,221,728.56