Finding the Third Proportional to 214,890 and 472,728

Step by Step Solution

1. Step 1: Write the proportion equation
   214,890 : 472,728 = 472,728 : x
2. Step 2: Convert to fraction form
   214,890/472,728 = 472,728/x
3. Step 3: Cross multiply
   214,890x = 472,728 × 472,728
4. Step 4: Simplify right side
   214,890x = 223,471,761,984
5. Step 5: Solve for x
   x = 223,471,761,984/214,890
6. Step 6: Final answer
   x = 1,039,935.60