Finding the Third Proportional to 502.31 and 765.56

Step by Step Solution

1. Step 1: Write the proportion equation
   502.31 : 765.56 = 765.56 : x
2. Step 2: Convert to fraction form
   502.31/765.56 = 765.56/x
3. Step 3: Cross multiply
   502.31x = 765.56 × 765.56
4. Step 4: Simplify right side
   502.31x = 586,085.94
5. Step 5: Solve for x
   x = 586,085.94/502.31
6. Step 6: Final answer
   x = 1,166.78