Finding the Third Proportional to 619,401 and 978,959

Step by Step Solution

1. Step 1: Write the proportion equation
   619,401 : 978,959 = 978,959 : x
2. Step 2: Convert to fraction form
   619,401/978,959 = 978,959/x
3. Step 3: Cross multiply
   619,401x = 978,959 × 978,959
4. Step 4: Simplify right side
   619,401x = 958,360,723,681
5. Step 5: Solve for x
   x = 958,360,723,681/619,401
6. Step 6: Final answer
   x = 1,547,237.93