Finding the Third Proportional to 671,348 and 1,420,456

Step by Step Solution

1. Step 1: Write the proportion equation
   671,348 : 1,420,456 = 1,420,456 : x
2. Step 2: Convert to fraction form
   671,348/1,420,456 = 1,420,456/x
3. Step 3: Cross multiply
   671,348x = 1,420,456 × 1,420,456
4. Step 4: Simplify right side
   671,348x = 2,017,695,247,936
5. Step 5: Solve for x
   x = 2,017,695,247,936/671,348
6. Step 6: Final answer
   x = 3,005,438.68