Finding the Third Proportional to 389,844 and 854,142

Step by Step Solution

1. Step 1: Write the proportion equation
   389,844 : 854,142 = 854,142 : x
2. Step 2: Convert to fraction form
   389,844/854,142 = 854,142/x
3. Step 3: Cross multiply
   389,844x = 854,142 × 854,142
4. Step 4: Simplify right side
   389,844x = 729,558,556,164
5. Step 5: Solve for x
   x = 729,558,556,164/389,844
6. Step 6: Final answer
   x = 1,871,411.53