Finding the Fourth Proportional to 2,308.05, 3,185.09 and 1,423.85

Step by Step Solution

1. Step 1: Write the proportion equation
   2,308.05 : 3,185.09 = 1,423.85 : x
2. Step 2: Convert to fraction form
   2,308.05/3,185.09 = 1,423.85/x
3. Step 3: Cross multiply
   2,308.05x = 3,185.09 × 1,423.85
4. Step 4: Simplify right side
   2,308.05x = 4,535,074.47
5. Step 5: Solve for x
   x = 4,535,074.47/2,308.05
6. Step 6: Final answer
   x = 1,964.90