Finding the Third Proportional to 717.94 and 1,521.31

Step by Step Solution

1. Step 1: Write the proportion equation
   717.94 : 1,521.31 = 1,521.31 : x
2. Step 2: Convert to fraction form
   717.94/1,521.31 = 1,521.31/x
3. Step 3: Cross multiply
   717.94x = 1,521.31 × 1,521.31
4. Step 4: Simplify right side
   717.94x = 2,314,391.72
5. Step 5: Solve for x
   x = 2,314,391.72/717.94
6. Step 6: Final answer
   x = 3,223.67