Finding the Third Proportional to 57.91 and 126.31

Step by Step Solution

1. Step 1: Write the proportion equation
   57.91 : 126.31 = 126.31 : x
2. Step 2: Convert to fraction form
   57.91/126.31 = 126.31/x
3. Step 3: Cross multiply
   57.91x = 126.31 × 126.31
4. Step 4: Simplify right side
   57.91x = 15,954.85
5. Step 5: Solve for x
   x = 15,954.85/57.91
6. Step 6: Final answer
   x = 275.53