Finding the Fourth Proportional to 3,991.50, 5,508.27 and 2,335.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,991.50 : 5,508.27 = 2,335.50 : x
2. Step 2: Convert to fraction form
   3,991.50/5,508.27 = 2,335.50/x
3. Step 3: Cross multiply
   3,991.50x = 5,508.27 × 2,335.50
4. Step 4: Simplify right side
   3,991.50x = 12,864,564.59
5. Step 5: Solve for x
   x = 12,864,564.59/3,991.50
6. Step 6: Final answer
   x = 3,222.99