Finding the Fourth Proportional to 3,886.82, 5,362.35 and 2,490.38

Step by Step Solution

1. Step 1: Write the proportion equation
   3,886.82 : 5,362.35 = 2,490.38 : x
2. Step 2: Convert to fraction form
   3,886.82/5,362.35 = 2,490.38/x
3. Step 3: Cross multiply
   3,886.82x = 5,362.35 × 2,490.38
4. Step 4: Simplify right side
   3,886.82x = 13,354,262.38
5. Step 5: Solve for x
   x = 13,354,262.38/3,886.82
6. Step 6: Final answer
   x = 3,435.79