Finding the Third Proportional to 111,909 and 228,987

Step by Step Solution

1. Step 1: Write the proportion equation
   111,909 : 228,987 = 228,987 : x
2. Step 2: Convert to fraction form
   111,909/228,987 = 228,987/x
3. Step 3: Cross multiply
   111,909x = 228,987 × 228,987
4. Step 4: Simplify right side
   111,909x = 52,435,046,169
5. Step 5: Solve for x
   x = 52,435,046,169/111,909
6. Step 6: Final answer
   x = 468,550.75