Finding the Third Proportional to 644,679 and 1,404,054

Step by Step Solution

1. Step 1: Write the proportion equation
   644,679 : 1,404,054 = 1,404,054 : x
2. Step 2: Convert to fraction form
   644,679/1,404,054 = 1,404,054/x
3. Step 3: Cross multiply
   644,679x = 1,404,054 × 1,404,054
4. Step 4: Simplify right side
   644,679x = 1,971,367,634,916
5. Step 5: Solve for x
   x = 1,971,367,634,916/644,679
6. Step 6: Final answer
   x = 3,057,905.77