Finding the Third Proportional to 819,588 and 1,679,640

Step by Step Solution

1. Step 1: Write the proportion equation
   819,588 : 1,679,640 = 1,679,640 : x
2. Step 2: Convert to fraction form
   819,588/1,679,640 = 1,679,640/x
3. Step 3: Cross multiply
   819,588x = 1,679,640 × 1,679,640
4. Step 4: Simplify right side
   819,588x = 2,821,190,529,600
5. Step 5: Solve for x
   x = 2,821,190,529,600/819,588
6. Step 6: Final answer
   x = 3,442,205.75