Finding the Fourth Proportional to 2,605.05, 3,908.03 and 1,145.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,605.05 : 3,908.03 = 1,145.23 : x
2. Step 2: Convert to fraction form
   2,605.05/3,908.03 = 1,145.23/x
3. Step 3: Cross multiply
   2,605.05x = 3,908.03 × 1,145.23
4. Step 4: Simplify right side
   2,605.05x = 4,475,593.20
5. Step 5: Solve for x
   x = 4,475,593.20/2,605.05
6. Step 6: Final answer
   x = 1,718.05