Finding the Fourth Proportional to 2,391.35, 3,583.37 and 1,091.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,391.35 : 3,583.37 = 1,091.30 : x
2. Step 2: Convert to fraction form
   2,391.35/3,583.37 = 1,091.30/x
3. Step 3: Cross multiply
   2,391.35x = 3,583.37 × 1,091.30
4. Step 4: Simplify right side
   2,391.35x = 3,910,516.49
5. Step 5: Solve for x
   x = 3,910,516.49/2,391.35
6. Step 6: Final answer
   x = 1,635.28