Finding the Fourth Proportional to 2,255.05, 3,378.09 and 1,765.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,255.05 : 3,378.09 = 1,765.81 : x
2. Step 2: Convert to fraction form
   2,255.05/3,378.09 = 1,765.81/x
3. Step 3: Cross multiply
   2,255.05x = 3,378.09 × 1,765.81
4. Step 4: Simplify right side
   2,255.05x = 5,965,065.10
5. Step 5: Solve for x
   x = 5,965,065.10/2,255.05
6. Step 6: Final answer
   x = 2,645.20