Finding the Third Proportional to 90.56 and 243.09

Step by Step Solution

1. Step 1: Write the proportion equation
   90.56 : 243.09 = 243.09 : x
2. Step 2: Convert to fraction form
   90.56/243.09 = 243.09/x
3. Step 3: Cross multiply
   90.56x = 243.09 × 243.09
4. Step 4: Simplify right side
   90.56x = 59,094.57
5. Step 5: Solve for x
   x = 59,094.57/90.56
6. Step 6: Final answer
   x = 652.53