Finding the Third Proportional to 663,990 and 1,440,570

Step by Step Solution

1. Step 1: Write the proportion equation
   663,990 : 1,440,570 = 1,440,570 : x
2. Step 2: Convert to fraction form
   663,990/1,440,570 = 1,440,570/x
3. Step 3: Cross multiply
   663,990x = 1,440,570 × 1,440,570
4. Step 4: Simplify right side
   663,990x = 2,075,241,924,900
5. Step 5: Solve for x
   x = 2,075,241,924,900/663,990
6. Step 6: Final answer
   x = 3,125,411.41