Finding the Third Proportional to 713,422 and 978,278

Step by Step Solution

1. Step 1: Write the proportion equation
   713,422 : 978,278 = 978,278 : x
2. Step 2: Convert to fraction form
   713,422/978,278 = 978,278/x
3. Step 3: Cross multiply
   713,422x = 978,278 × 978,278
4. Step 4: Simplify right side
   713,422x = 957,027,845,284
5. Step 5: Solve for x
   x = 957,027,845,284/713,422
6. Step 6: Final answer
   x = 1,341,461.08