Finding the Third Proportional to 487.69 and 756.56

Step by Step Solution

1. Step 1: Write the proportion equation
   487.69 : 756.56 = 756.56 : x
2. Step 2: Convert to fraction form
   487.69/756.56 = 756.56/x
3. Step 3: Cross multiply
   487.69x = 756.56 × 756.56
4. Step 4: Simplify right side
   487.69x = 572,386.82
5. Step 5: Solve for x
   x = 572,386.82/487.69
6. Step 6: Final answer
   x = 1,173.68