Finding the Third Proportional to 451,857 and 978,099

Step by Step Solution

1. Step 1: Write the proportion equation
   451,857 : 978,099 = 978,099 : x
2. Step 2: Convert to fraction form
   451,857/978,099 = 978,099/x
3. Step 3: Cross multiply
   451,857x = 978,099 × 978,099
4. Step 4: Simplify right side
   451,857x = 956,677,653,801
5. Step 5: Solve for x
   x = 956,677,653,801/451,857
6. Step 6: Final answer
   x = 2,117,213.31