Finding the Third Proportional to 646,510 and 978,763

Step by Step Solution

1. Step 1: Write the proportion equation
   646,510 : 978,763 = 978,763 : x
2. Step 2: Convert to fraction form
   646,510/978,763 = 978,763/x
3. Step 3: Cross multiply
   646,510x = 978,763 × 978,763
4. Step 4: Simplify right side
   646,510x = 957,977,010,169
5. Step 5: Solve for x
   x = 957,977,010,169/646,510
6. Step 6: Final answer
   x = 1,481,766.73