Finding the Fourth Proportional to 2,288.50, 3,431.54 and 1,055.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,288.50 : 3,431.54 = 1,055.28 : x
2. Step 2: Convert to fraction form
   2,288.50/3,431.54 = 1,055.28/x
3. Step 3: Cross multiply
   2,288.50x = 3,431.54 × 1,055.28
4. Step 4: Simplify right side
   2,288.50x = 3,621,213.10
5. Step 5: Solve for x
   x = 3,621,213.10/2,288.50
6. Step 6: Final answer
   x = 1,582.35