Finding the Third Proportional to 648,378 and 1,413,720

Step by Step Solution

1. Step 1: Write the proportion equation
   648,378 : 1,413,720 = 1,413,720 : x
2. Step 2: Convert to fraction form
   648,378/1,413,720 = 1,413,720/x
3. Step 3: Cross multiply
   648,378x = 1,413,720 × 1,413,720
4. Step 4: Simplify right side
   648,378x = 1,998,604,238,400
5. Step 5: Solve for x
   x = 1,998,604,238,400/648,378
6. Step 6: Final answer
   x = 3,082,467.69