Finding the Third Proportional to 713,620 and 978,559

Step by Step Solution

1. Step 1: Write the proportion equation
   713,620 : 978,559 = 978,559 : x
2. Step 2: Convert to fraction form
   713,620/978,559 = 978,559/x
3. Step 3: Cross multiply
   713,620x = 978,559 × 978,559
4. Step 4: Simplify right side
   713,620x = 957,577,716,481
5. Step 5: Solve for x
   x = 957,577,716,481/713,620
6. Step 6: Final answer
   x = 1,341,859.42