Finding the Fourth Proportional to 3,100.88, 4,280.88 and 2,391.19

Step by Step Solution

1. Step 1: Write the proportion equation
   3,100.88 : 4,280.88 = 2,391.19 : x
2. Step 2: Convert to fraction form
   3,100.88/4,280.88 = 2,391.19/x
3. Step 3: Cross multiply
   3,100.88x = 4,280.88 × 2,391.19
4. Step 4: Simplify right side
   3,100.88x = 10,236,395.71
5. Step 5: Solve for x
   x = 10,236,395.71/3,100.88
6. Step 6: Final answer
   x = 3,301.12