Finding the Third Proportional to 90.56 and 170.06

Step by Step Solution

1. Step 1: Write the proportion equation
   90.56 : 170.06 = 170.06 : x
2. Step 2: Convert to fraction form
   90.56/170.06 = 170.06/x
3. Step 3: Cross multiply
   90.56x = 170.06 × 170.06
4. Step 4: Simplify right side
   90.56x = 28,921.25
5. Step 5: Solve for x
   x = 28,921.25/90.56
6. Step 6: Final answer
   x = 319.35