Finding the Fourth Proportional to 3,890.09, 5,364.78 and 2,563.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,890.09 : 5,364.78 = 2,563.31 : x
2. Step 2: Convert to fraction form
   3,890.09/5,364.78 = 2,563.31/x
3. Step 3: Cross multiply
   3,890.09x = 5,364.78 × 2,563.31
4. Step 4: Simplify right side
   3,890.09x = 13,751,594.22
5. Step 5: Solve for x
   x = 13,751,594.22/3,890.09
6. Step 6: Final answer
   x = 3,535.03