Finding the Third Proportional to 2,190.80 and 3,288.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,190.80 : 3,288.09 = 3,288.09 : x
2. Step 2: Convert to fraction form
   2,190.80/3,288.09 = 3,288.09/x
3. Step 3: Cross multiply
   2,190.80x = 3,288.09 × 3,288.09
4. Step 4: Simplify right side
   2,190.80x = 10,811,560.51
5. Step 5: Solve for x
   x = 10,811,560.51/2,190.80
6. Step 6: Final answer
   x = 4,934.99