Finding the Third Proportional to 57.50 and 126.50

Step by Step Solution

1. Step 1: Write the proportion equation
   57.50 : 126.50 = 126.50 : x
2. Step 2: Convert to fraction form
   57.50/126.50 = 126.50/x
3. Step 3: Cross multiply
   57.50x = 126.50 × 126.50
4. Step 4: Simplify right side
   57.50x = 16,002.25
5. Step 5: Solve for x
   x = 16,002.25/57.50
6. Step 6: Final answer
   x = 278.30