Finding the Third Proportional to 998,478 and 2,187,018

Step by Step Solution

1. Step 1: Write the proportion equation
   998,478 : 2,187,018 = 2,187,018 : x
2. Step 2: Convert to fraction form
   998,478/2,187,018 = 2,187,018/x
3. Step 3: Cross multiply
   998,478x = 2,187,018 × 2,187,018
4. Step 4: Simplify right side
   998,478x = 4,783,047,732,324
5. Step 5: Solve for x
   x = 4,783,047,732,324/998,478
6. Step 6: Final answer
   x = 4,790,338.63