Finding the Third Proportional to 451,858 and 978,110

Step by Step Solution

1. Step 1: Write the proportion equation
   451,858 : 978,110 = 978,110 : x
2. Step 2: Convert to fraction form
   451,858/978,110 = 978,110/x
3. Step 3: Cross multiply
   451,858x = 978,110 × 978,110
4. Step 4: Simplify right side
   451,858x = 956,699,172,100
5. Step 5: Solve for x
   x = 956,699,172,100/451,858
6. Step 6: Final answer
   x = 2,117,256.24