Finding the Fourth Proportional to 2,250.55, 3,105.39 and 1,255.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,250.55 : 3,105.39 = 1,255.80 : x
2. Step 2: Convert to fraction form
   2,250.55/3,105.39 = 1,255.80/x
3. Step 3: Cross multiply
   2,250.55x = 3,105.39 × 1,255.80
4. Step 4: Simplify right side
   2,250.55x = 3,899,748.76
5. Step 5: Solve for x
   x = 3,899,748.76/2,250.55
6. Step 6: Final answer
   x = 1,732.80