Finding the Third Proportional to 100.50 and 248.81

Step by Step Solution

1. Step 1: Write the proportion equation
   100.50 : 248.81 = 248.81 : x
2. Step 2: Convert to fraction form
   100.50/248.81 = 248.81/x
3. Step 3: Cross multiply
   100.50x = 248.81 × 248.81
4. Step 4: Simplify right side
   100.50x = 61,907.66
5. Step 5: Solve for x
   x = 61,907.66/100.50
6. Step 6: Final answer
   x = 616.00