Finding the Third Proportional to 3,315.75 and 4,357.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,315.75 : 4,357.50 = 4,357.50 : x
2. Step 2: Convert to fraction form
   3,315.75/4,357.50 = 4,357.50/x
3. Step 3: Cross multiply
   3,315.75x = 4,357.50 × 4,357.50
4. Step 4: Simplify right side
   3,315.75x = 18,987,806.25
5. Step 5: Solve for x
   x = 18,987,806.25/3,315.75
6. Step 6: Final answer
   x = 5,726.55