Finding the Third Proportional to 442,709 and 978,447

Step by Step Solution

1. Step 1: Write the proportion equation
   442,709 : 978,447 = 978,447 : x
2. Step 2: Convert to fraction form
   442,709/978,447 = 978,447/x
3. Step 3: Cross multiply
   442,709x = 978,447 × 978,447
4. Step 4: Simplify right side
   442,709x = 957,358,531,809
5. Step 5: Solve for x
   x = 957,358,531,809/442,709
6. Step 6: Final answer
   x = 2,162,500.72