Finding the Third Proportional to 398,016 and 871,632

Step by Step Solution

1. Step 1: Write the proportion equation
   398,016 : 871,632 = 871,632 : x
2. Step 2: Convert to fraction form
   398,016/871,632 = 871,632/x
3. Step 3: Cross multiply
   398,016x = 871,632 × 871,632
4. Step 4: Simplify right side
   398,016x = 759,742,343,424
5. Step 5: Solve for x
   x = 759,742,343,424/398,016
6. Step 6: Final answer
   x = 1,908,823.62