Finding the Third Proportional to 200.25 and 216.56

Step by Step Solution

1. Step 1: Write the proportion equation
   200.25 : 216.56 = 216.56 : x
2. Step 2: Convert to fraction form
   200.25/216.56 = 216.56/x
3. Step 3: Cross multiply
   200.25x = 216.56 × 216.56
4. Step 4: Simplify right side
   200.25x = 46,899.32
5. Step 5: Solve for x
   x = 46,899.32/200.25
6. Step 6: Final answer
   x = 234.20