Finding the Third Proportional to 57.43 and 86.54

Step by Step Solution

1. Step 1: Write the proportion equation
   57.43 : 86.54 = 86.54 : x
2. Step 2: Convert to fraction form
   57.43/86.54 = 86.54/x
3. Step 3: Cross multiply
   57.43x = 86.54 × 86.54
4. Step 4: Simplify right side
   57.43x = 7,488.67
5. Step 5: Solve for x
   x = 7,488.67/57.43
6. Step 6: Final answer
   x = 130.40