Finding the Third Proportional to 678,807 and 1,006,470

Step by Step Solution

1. Step 1: Write the proportion equation
   678,807 : 1,006,470 = 1,006,470 : x
2. Step 2: Convert to fraction form
   678,807/1,006,470 = 1,006,470/x
3. Step 3: Cross multiply
   678,807x = 1,006,470 × 1,006,470
4. Step 4: Simplify right side
   678,807x = 1,012,981,860,900
5. Step 5: Solve for x
   x = 1,012,981,860,900/678,807
6. Step 6: Final answer
   x = 1,492,297.31