Finding the Fourth Proportional to 3,886.86, 5,362.83 and 2,490.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,886.86 : 5,362.83 = 2,490.42 : x
2. Step 2: Convert to fraction form
   3,886.86/5,362.83 = 2,490.42/x
3. Step 3: Cross multiply
   3,886.86x = 5,362.83 × 2,490.42
4. Step 4: Simplify right side
   3,886.86x = 13,355,699.09
5. Step 5: Solve for x
   x = 13,355,699.09/3,886.86
6. Step 6: Final answer
   x = 3,436.12