Finding the Third Proportional to 451,860 and 978,105

Step by Step Solution

1. Step 1: Write the proportion equation
   451,860 : 978,105 = 978,105 : x
2. Step 2: Convert to fraction form
   451,860/978,105 = 978,105/x
3. Step 3: Cross multiply
   451,860x = 978,105 × 978,105
4. Step 4: Simplify right side
   451,860x = 956,689,391,025
5. Step 5: Solve for x
   x = 956,689,391,025/451,860
6. Step 6: Final answer
   x = 2,117,225.23