Finding the Fourth Proportional to 3,111.10, 4,290.03 and 2,403.06

Step by Step Solution

1. Step 1: Write the proportion equation
   3,111.10 : 4,290.03 = 2,403.06 : x
2. Step 2: Convert to fraction form
   3,111.10/4,290.03 = 2,403.06/x
3. Step 3: Cross multiply
   3,111.10x = 4,290.03 × 2,403.06
4. Step 4: Simplify right side
   3,111.10x = 10,309,207.54
5. Step 5: Solve for x
   x = 10,309,207.54/3,111.10
6. Step 6: Final answer
   x = 3,313.68