Finding the Third Proportional to 689,839 and 1,030,510

Step by Step Solution

1. Step 1: Write the proportion equation
   689,839 : 1,030,510 = 1,030,510 : x
2. Step 2: Convert to fraction form
   689,839/1,030,510 = 1,030,510/x
3. Step 3: Cross multiply
   689,839x = 1,030,510 × 1,030,510
4. Step 4: Simplify right side
   689,839x = 1,061,950,860,100
5. Step 5: Solve for x
   x = 1,061,950,860,100/689,839
6. Step 6: Final answer
   x = 1,539,418.42