Finding the Third Proportional to 100.25 and 210.25

Step by Step Solution

1. Step 1: Write the proportion equation
   100.25 : 210.25 = 210.25 : x
2. Step 2: Convert to fraction form
   100.25/210.25 = 210.25/x
3. Step 3: Cross multiply
   100.25x = 210.25 × 210.25
4. Step 4: Simplify right side
   100.25x = 44,205.06
5. Step 5: Solve for x
   x = 44,205.06/100.25
6. Step 6: Final answer
   x = 440.95