Finding the Third Proportional to 91.50 and 210.25

Step by Step Solution

1. Step 1: Write the proportion equation
   91.50 : 210.25 = 210.25 : x
2. Step 2: Convert to fraction form
   91.50/210.25 = 210.25/x
3. Step 3: Cross multiply
   91.50x = 210.25 × 210.25
4. Step 4: Simplify right side
   91.50x = 44,205.06
5. Step 5: Solve for x
   x = 44,205.06/91.50
6. Step 6: Final answer
   x = 483.12