Finding the Third Proportional to 222,128 and 485,680

Step by Step Solution

1. Step 1: Write the proportion equation
   222,128 : 485,680 = 485,680 : x
2. Step 2: Convert to fraction form
   222,128/485,680 = 485,680/x
3. Step 3: Cross multiply
   222,128x = 485,680 × 485,680
4. Step 4: Simplify right side
   222,128x = 235,885,062,400
5. Step 5: Solve for x
   x = 235,885,062,400/222,128
6. Step 6: Final answer
   x = 1,061,933.04