Finding the Third Proportional to 443,418 and 688,002

Step by Step Solution

1. Step 1: Write the proportion equation
   443,418 : 688,002 = 688,002 : x
2. Step 2: Convert to fraction form
   443,418/688,002 = 688,002/x
3. Step 3: Cross multiply
   443,418x = 688,002 × 688,002
4. Step 4: Simplify right side
   443,418x = 473,346,752,004
5. Step 5: Solve for x
   x = 473,346,752,004/443,418
6. Step 6: Final answer
   x = 1,067,495.57