Finding the Fourth Proportional to 2,405.63, 3,609.56 and 1,308.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,405.63 : 3,609.56 = 1,308.69 : x
2. Step 2: Convert to fraction form
   2,405.63/3,609.56 = 1,308.69/x
3. Step 3: Cross multiply
   2,405.63x = 3,609.56 × 1,308.69
4. Step 4: Simplify right side
   2,405.63x = 4,723,798.35
5. Step 5: Solve for x
   x = 4,723,798.35/2,405.63
6. Step 6: Final answer
   x = 1,963.64