Finding the Third Proportional to 251.82 and 554.89

Step by Step Solution

1. Step 1: Write the proportion equation
   251.82 : 554.89 = 554.89 : x
2. Step 2: Convert to fraction form
   251.82/554.89 = 554.89/x
3. Step 3: Cross multiply
   251.82x = 554.89 × 554.89
4. Step 4: Simplify right side
   251.82x = 307,905.71
5. Step 5: Solve for x
   x = 307,905.71/251.82
6. Step 6: Final answer
   x = 1,222.73