Finding the Third Proportional to 2,279.25 and 3,515.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,279.25 : 3,515.25 = 3,515.25 : x
2. Step 2: Convert to fraction form
   2,279.25/3,515.25 = 3,515.25/x
3. Step 3: Cross multiply
   2,279.25x = 3,515.25 × 3,515.25
4. Step 4: Simplify right side
   2,279.25x = 12,356,982.56
5. Step 5: Solve for x
   x = 12,356,982.56/2,279.25
6. Step 6: Final answer
   x = 5,421.51