Finding the Fourth Proportional to 2,255.45, 3,112.91 and 1,311.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,255.45 : 3,112.91 = 1,311.52 : x
2. Step 2: Convert to fraction form
   2,255.45/3,112.91 = 1,311.52/x
3. Step 3: Cross multiply
   2,255.45x = 3,112.91 × 1,311.52
4. Step 4: Simplify right side
   2,255.45x = 4,082,627.69
5. Step 5: Solve for x
   x = 4,082,627.69/2,255.45
6. Step 6: Final answer
   x = 1,810.12