Finding the Third Proportional to 389,844 and 854,140

Step by Step Solution

1. Step 1: Write the proportion equation
   389,844 : 854,140 = 854,140 : x
2. Step 2: Convert to fraction form
   389,844/854,140 = 854,140/x
3. Step 3: Cross multiply
   389,844x = 854,140 × 854,140
4. Step 4: Simplify right side
   389,844x = 729,555,139,600
5. Step 5: Solve for x
   x = 729,555,139,600/389,844
6. Step 6: Final answer
   x = 1,871,402.77