Finding the Third Proportional to 619,405 and 978,965

Step by Step Solution

1. Step 1: Write the proportion equation
   619,405 : 978,965 = 978,965 : x
2. Step 2: Convert to fraction form
   619,405/978,965 = 978,965/x
3. Step 3: Cross multiply
   619,405x = 978,965 × 978,965
4. Step 4: Simplify right side
   619,405x = 958,372,471,225
5. Step 5: Solve for x
   x = 958,372,471,225/619,405
6. Step 6: Final answer
   x = 1,547,246.91