Finding the Third Proportional to 220,920 and 471,240

Step by Step Solution

1. Step 1: Write the proportion equation
   220,920 : 471,240 = 471,240 : x
2. Step 2: Convert to fraction form
   220,920/471,240 = 471,240/x
3. Step 3: Cross multiply
   220,920x = 471,240 × 471,240
4. Step 4: Simplify right side
   220,920x = 222,067,137,600
5. Step 5: Solve for x
   x = 222,067,137,600/220,920
6. Step 6: Final answer
   x = 1,005,192.55