Finding the Third Proportional to 447,495 and 978,278

Step by Step Solution

1. Step 1: Write the proportion equation
   447,495 : 978,278 = 978,278 : x
2. Step 2: Convert to fraction form
   447,495/978,278 = 978,278/x
3. Step 3: Cross multiply
   447,495x = 978,278 × 978,278
4. Step 4: Simplify right side
   447,495x = 957,027,845,284
5. Step 5: Solve for x
   x = 957,027,845,284/447,495
6. Step 6: Final answer
   x = 2,138,633.61