Finding the Third Proportional to 713,838 and 978,807

Step by Step Solution

1. Step 1: Write the proportion equation
   713,838 : 978,807 = 978,807 : x
2. Step 2: Convert to fraction form
   713,838/978,807 = 978,807/x
3. Step 3: Cross multiply
   713,838x = 978,807 × 978,807
4. Step 4: Simplify right side
   713,838x = 958,063,143,249
5. Step 5: Solve for x
   x = 958,063,143,249/713,838
6. Step 6: Final answer
   x = 1,342,129.65