Finding the Third Proportional to 619,415 and 978,980

Step by Step Solution

1. Step 1: Write the proportion equation
   619,415 : 978,980 = 978,980 : x
2. Step 2: Convert to fraction form
   619,415/978,980 = 978,980/x
3. Step 3: Cross multiply
   619,415x = 978,980 × 978,980
4. Step 4: Simplify right side
   619,415x = 958,401,840,400
5. Step 5: Solve for x
   x = 958,401,840,400/619,415
6. Step 6: Final answer
   x = 1,547,269.34