Finding the Third Proportional to 451,861 and 978,107

Step by Step Solution

1. Step 1: Write the proportion equation
   451,861 : 978,107 = 978,107 : x
2. Step 2: Convert to fraction form
   451,861/978,107 = 978,107/x
3. Step 3: Cross multiply
   451,861x = 978,107 × 978,107
4. Step 4: Simplify right side
   451,861x = 956,693,303,449
5. Step 5: Solve for x
   x = 956,693,303,449/451,861
6. Step 6: Final answer
   x = 2,117,229.20