Finding the Third Proportional to 213.89 and 483.05

Step by Step Solution

1. Step 1: Write the proportion equation
   213.89 : 483.05 = 483.05 : x
2. Step 2: Convert to fraction form
   213.89/483.05 = 483.05/x
3. Step 3: Cross multiply
   213.89x = 483.05 × 483.05
4. Step 4: Simplify right side
   213.89x = 233,334.28
5. Step 5: Solve for x
   x = 233,334.28/213.89
6. Step 6: Final answer
   x = 1,090.90