Finding the Fourth Proportional to 3,886.38, 5,363.82 and 2,315.39

Step by Step Solution

1. Step 1: Write the proportion equation
   3,886.38 : 5,363.82 = 2,315.39 : x
2. Step 2: Convert to fraction form
   3,886.38/5,363.82 = 2,315.39/x
3. Step 3: Cross multiply
   3,886.38x = 5,363.82 × 2,315.39
4. Step 4: Simplify right side
   3,886.38x = 12,419,308.37
5. Step 5: Solve for x
   x = 12,419,308.37/3,886.38
6. Step 6: Final answer
   x = 3,195.60