Finding the Third Proportional to 447,499 and 978,286

Step by Step Solution

1. Step 1: Write the proportion equation
   447,499 : 978,286 = 978,286 : x
2. Step 2: Convert to fraction form
   447,499/978,286 = 978,286/x
3. Step 3: Cross multiply
   447,499x = 978,286 × 978,286
4. Step 4: Simplify right side
   447,499x = 957,043,497,796
5. Step 5: Solve for x
   x = 957,043,497,796/447,499
6. Step 6: Final answer
   x = 2,138,649.47