Finding the Third Proportional to 698,666 and 1,054,638

Step by Step Solution

1. Step 1: Write the proportion equation
   698,666 : 1,054,638 = 1,054,638 : x
2. Step 2: Convert to fraction form
   698,666/1,054,638 = 1,054,638/x
3. Step 3: Cross multiply
   698,666x = 1,054,638 × 1,054,638
4. Step 4: Simplify right side
   698,666x = 1,112,261,311,044
5. Step 5: Solve for x
   x = 1,112,261,311,044/698,666
6. Step 6: Final answer
   x = 1,591,978.59