Finding the Third Proportional to 687.94 and 1,501.31

Step by Step Solution

1. Step 1: Write the proportion equation
   687.94 : 1,501.31 = 1,501.31 : x
2. Step 2: Convert to fraction form
   687.94/1,501.31 = 1,501.31/x
3. Step 3: Cross multiply
   687.94x = 1,501.31 × 1,501.31
4. Step 4: Simplify right side
   687.94x = 2,253,939.22
5. Step 5: Solve for x
   x = 2,253,939.22/687.94
6. Step 6: Final answer
   x = 3,276.37