Finding the Third Proportional to 103,890 and 222,180

Step by Step Solution

1. Step 1: Write the proportion equation
   103,890 : 222,180 = 222,180 : x
2. Step 2: Convert to fraction form
   103,890/222,180 = 222,180/x
3. Step 3: Cross multiply
   103,890x = 222,180 × 222,180
4. Step 4: Simplify right side
   103,890x = 49,363,952,400
5. Step 5: Solve for x
   x = 49,363,952,400/103,890
6. Step 6: Final answer
   x = 475,155.96