Finding the Third Proportional to 632,485 and 978,289

Step by Step Solution

1. Step 1: Write the proportion equation
   632,485 : 978,289 = 978,289 : x
2. Step 2: Convert to fraction form
   632,485/978,289 = 978,289/x
3. Step 3: Cross multiply
   632,485x = 978,289 × 978,289
4. Step 4: Simplify right side
   632,485x = 957,049,367,521
5. Step 5: Solve for x
   x = 957,049,367,521/632,485
6. Step 6: Final answer
   x = 1,513,157.41