Finding the Fourth Proportional to 2,355.27, 3,531.69 and 1,055.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,355.27 : 3,531.69 = 1,055.63 : x
2. Step 2: Convert to fraction form
   2,355.27/3,531.69 = 1,055.63/x
3. Step 3: Cross multiply
   2,355.27x = 3,531.69 × 1,055.63
4. Step 4: Simplify right side
   2,355.27x = 3,728,140.26
5. Step 5: Solve for x
   x = 3,728,140.26/2,355.27
6. Step 6: Final answer
   x = 1,582.89