Finding the Fourth Proportional to 3,111.88, 4,291.86 and 2,326.60

Step by Step Solution

1. Step 1: Write the proportion equation
   3,111.88 : 4,291.86 = 2,326.60 : x
2. Step 2: Convert to fraction form
   3,111.88/4,291.86 = 2,326.60/x
3. Step 3: Cross multiply
   3,111.88x = 4,291.86 × 2,326.60
4. Step 4: Simplify right side
   3,111.88x = 9,985,441.48
5. Step 5: Solve for x
   x = 9,985,441.48/3,111.88
6. Step 6: Final answer
   x = 3,208.81