Finding the Third Proportional to 644,560 and 1,404,664

Step by Step Solution

1. Step 1: Write the proportion equation
   644,560 : 1,404,664 = 1,404,664 : x
2. Step 2: Convert to fraction form
   644,560/1,404,664 = 1,404,664/x
3. Step 3: Cross multiply
   644,560x = 1,404,664 × 1,404,664
4. Step 4: Simplify right side
   644,560x = 1,973,080,952,896
5. Step 5: Solve for x
   x = 1,973,080,952,896/644,560
6. Step 6: Final answer
   x = 3,061,128.45