Finding the Third Proportional to 713,580 and 978,499

Step by Step Solution

1. Step 1: Write the proportion equation
   713,580 : 978,499 = 978,499 : x
2. Step 2: Convert to fraction form
   713,580/978,499 = 978,499/x
3. Step 3: Cross multiply
   713,580x = 978,499 × 978,499
4. Step 4: Simplify right side
   713,580x = 957,460,293,001
5. Step 5: Solve for x
   x = 957,460,293,001/713,580
6. Step 6: Final answer
   x = 1,341,770.08