Finding the Third Proportional to 228,138 and 333,279

Step by Step Solution

1. Step 1: Write the proportion equation
   228,138 : 333,279 = 333,279 : x
2. Step 2: Convert to fraction form
   228,138/333,279 = 333,279/x
3. Step 3: Cross multiply
   228,138x = 333,279 × 333,279
4. Step 4: Simplify right side
   228,138x = 111,074,891,841
5. Step 5: Solve for x
   x = 111,074,891,841/228,138
6. Step 6: Final answer
   x = 486,875.89