Finding the Third Proportional to 645,442 and 1,402,824

Step by Step Solution

1. Step 1: Write the proportion equation
   645,442 : 1,402,824 = 1,402,824 : x
2. Step 2: Convert to fraction form
   645,442/1,402,824 = 1,402,824/x
3. Step 3: Cross multiply
   645,442x = 1,402,824 × 1,402,824
4. Step 4: Simplify right side
   645,442x = 1,967,915,174,976
5. Step 5: Solve for x
   x = 1,967,915,174,976/645,442
6. Step 6: Final answer
   x = 3,048,941.93