Finding the Third Proportional to 713,429 and 978,289

Step by Step Solution

1. Step 1: Write the proportion equation
   713,429 : 978,289 = 978,289 : x
2. Step 2: Convert to fraction form
   713,429/978,289 = 978,289/x
3. Step 3: Cross multiply
   713,429x = 978,289 × 978,289
4. Step 4: Simplify right side
   713,429x = 957,049,367,521
5. Step 5: Solve for x
   x = 957,049,367,521/713,429
6. Step 6: Final answer
   x = 1,341,478.08