Finding the Third Proportional to 407,928 and 871,908

Step by Step Solution

1. Step 1: Write the proportion equation
   407,928 : 871,908 = 871,908 : x
2. Step 2: Convert to fraction form
   407,928/871,908 = 871,908/x
3. Step 3: Cross multiply
   407,928x = 871,908 × 871,908
4. Step 4: Simplify right side
   407,928x = 760,223,560,464
5. Step 5: Solve for x
   x = 760,223,560,464/407,928
6. Step 6: Final answer
   x = 1,863,621.91