Finding the Third Proportional to 645,412 and 1,402,766

Step by Step Solution

1. Step 1: Write the proportion equation
   645,412 : 1,402,766 = 1,402,766 : x
2. Step 2: Convert to fraction form
   645,412/1,402,766 = 1,402,766/x
3. Step 3: Cross multiply
   645,412x = 1,402,766 × 1,402,766
4. Step 4: Simplify right side
   645,412x = 1,967,752,450,756
5. Step 5: Solve for x
   x = 1,967,752,450,756/645,412
6. Step 6: Final answer
   x = 3,048,831.52