Finding the Third Proportional to 401,380 and 871,856

Step by Step Solution

1. Step 1: Write the proportion equation
   401,380 : 871,856 = 871,856 : x
2. Step 2: Convert to fraction form
   401,380/871,856 = 871,856/x
3. Step 3: Cross multiply
   401,380x = 871,856 × 871,856
4. Step 4: Simplify right side
   401,380x = 760,132,884,736
5. Step 5: Solve for x
   x = 760,132,884,736/401,380
6. Step 6: Final answer
   x = 1,893,798.61