Finding the Third Proportional to 389,853 and 850,216.50

Step by Step Solution

1. Step 1: Write the proportion equation
   389,853 : 850,216.50 = 850,216.50 : x
2. Step 2: Convert to fraction form
   389,853/850,216.50 = 850,216.50/x
3. Step 3: Cross multiply
   389,853x = 850,216.50 × 850,216.50
4. Step 4: Simplify right side
   389,853x = 722,868,096,872.25
5. Step 5: Solve for x
   x = 722,868,096,872.25/389,853
6. Step 6: Final answer
   x = 1,854,206.83