Finding the Third Proportional to 447,487 and 978,262

Step by Step Solution

1. Step 1: Write the proportion equation
   447,487 : 978,262 = 978,262 : x
2. Step 2: Convert to fraction form
   447,487/978,262 = 978,262/x
3. Step 3: Cross multiply
   447,487x = 978,262 × 978,262
4. Step 4: Simplify right side
   447,487x = 956,996,540,644
5. Step 5: Solve for x
   x = 956,996,540,644/447,487
6. Step 6: Final answer
   x = 2,138,601.88