Finding the Fourth Proportional to 2,540.09, 3,812.47 and 1,308.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,540.09 : 3,812.47 = 1,308.39 : x
2. Step 2: Convert to fraction form
   2,540.09/3,812.47 = 1,308.39/x
3. Step 3: Cross multiply
   2,540.09x = 3,812.47 × 1,308.39
4. Step 4: Simplify right side
   2,540.09x = 4,988,180.06
5. Step 5: Solve for x
   x = 4,988,180.06/2,540.09
6. Step 6: Final answer
   x = 1,963.78