Finding the Third Proportional to 480.56 and 711.56

Step by Step Solution

1. Step 1: Write the proportion equation
   480.56 : 711.56 = 711.56 : x
2. Step 2: Convert to fraction form
   480.56/711.56 = 711.56/x
3. Step 3: Cross multiply
   480.56x = 711.56 × 711.56
4. Step 4: Simplify right side
   480.56x = 506,321.19
5. Step 5: Solve for x
   x = 506,321.19/480.56
6. Step 6: Final answer
   x = 1,053.60