Finding the Third Proportional to 57.38 and 90.56

Step by Step Solution

1. Step 1: Write the proportion equation
   57.38 : 90.56 = 90.56 : x
2. Step 2: Convert to fraction form
   57.38/90.56 = 90.56/x
3. Step 3: Cross multiply
   57.38x = 90.56 × 90.56
4. Step 4: Simplify right side
   57.38x = 8,201.57
5. Step 5: Solve for x
   x = 8,201.57/57.38
6. Step 6: Final answer
   x = 142.95