Finding the Third Proportional to 100.50 and 251.25

Step by Step Solution

1. Step 1: Write the proportion equation
   100.50 : 251.25 = 251.25 : x
2. Step 2: Convert to fraction form
   100.50/251.25 = 251.25/x
3. Step 3: Cross multiply
   100.50x = 251.25 × 251.25
4. Step 4: Simplify right side
   100.50x = 63,126.56
5. Step 5: Solve for x
   x = 63,126.56/100.50
6. Step 6: Final answer
   x = 628.13