Finding the Third Proportional to 99.56 and 210.09

Step by Step Solution

1. Step 1: Write the proportion equation
   99.56 : 210.09 = 210.09 : x
2. Step 2: Convert to fraction form
   99.56/210.09 = 210.09/x
3. Step 3: Cross multiply
   99.56x = 210.09 × 210.09
4. Step 4: Simplify right side
   99.56x = 44,139.38
5. Step 5: Solve for x
   x = 44,139.38/99.56
6. Step 6: Final answer
   x = 443.33