Finding the Fourth Proportional to 2,391.72, 3,584.52 and 1,093.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,391.72 : 3,584.52 = 1,093.20 : x
2. Step 2: Convert to fraction form
   2,391.72/3,584.52 = 1,093.20/x
3. Step 3: Cross multiply
   2,391.72x = 3,584.52 × 1,093.20
4. Step 4: Simplify right side
   2,391.72x = 3,918,597.26
5. Step 5: Solve for x
   x = 3,918,597.26/2,391.72
6. Step 6: Final answer
   x = 1,638.40