Finding the Third Proportional to 125.56 and 253.69

Step by Step Solution

1. Step 1: Write the proportion equation
   125.56 : 253.69 = 253.69 : x
2. Step 2: Convert to fraction form
   125.56/253.69 = 253.69/x
3. Step 3: Cross multiply
   125.56x = 253.69 × 253.69
4. Step 4: Simplify right side
   125.56x = 64,357.35
5. Step 5: Solve for x
   x = 64,357.35/125.56
6. Step 6: Final answer
   x = 512.55