Finding the Third Proportional to 678,228 and 1,048,518

Step by Step Solution

1. Step 1: Write the proportion equation
   678,228 : 1,048,518 = 1,048,518 : x
2. Step 2: Convert to fraction form
   678,228/1,048,518 = 1,048,518/x
3. Step 3: Cross multiply
   678,228x = 1,048,518 × 1,048,518
4. Step 4: Simplify right side
   678,228x = 1,099,389,996,324
5. Step 5: Solve for x
   x = 1,099,389,996,324/678,228
6. Step 6: Final answer
   x = 1,620,974.06