Finding the Third Proportional to 2,115.59 and 3,288.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,115.59 : 3,288.71 = 3,288.71 : x
2. Step 2: Convert to fraction form
   2,115.59/3,288.71 = 3,288.71/x
3. Step 3: Cross multiply
   2,115.59x = 3,288.71 × 3,288.71
4. Step 4: Simplify right side
   2,115.59x = 10,815,608.59
5. Step 5: Solve for x
   x = 10,815,608.59/2,115.59
6. Step 6: Final answer
   x = 5,112.35