Finding the Third Proportional to 455,879 and 978,218

Step by Step Solution

1. Step 1: Write the proportion equation
   455,879 : 978,218 = 978,218 : x
2. Step 2: Convert to fraction form
   455,879/978,218 = 978,218/x
3. Step 3: Cross multiply
   455,879x = 978,218 × 978,218
4. Step 4: Simplify right side
   455,879x = 956,910,455,524
5. Step 5: Solve for x
   x = 956,910,455,524/455,879
6. Step 6: Final answer
   x = 2,099,044.82