Finding the Third Proportional to 587,990 and 1,288,075

Step by Step Solution

1. Step 1: Write the proportion equation
   587,990 : 1,288,075 = 1,288,075 : x
2. Step 2: Convert to fraction form
   587,990/1,288,075 = 1,288,075/x
3. Step 3: Cross multiply
   587,990x = 1,288,075 × 1,288,075
4. Step 4: Simplify right side
   587,990x = 1,659,137,205,625
5. Step 5: Solve for x
   x = 1,659,137,205,625/587,990
6. Step 6: Final answer
   x = 2,821,709.90