Finding the Fourth Proportional to 2,303.55, 3,178.92 and 1,255.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,303.55 : 3,178.92 = 1,255.61 : x
2. Step 2: Convert to fraction form
   2,303.55/3,178.92 = 1,255.61/x
3. Step 3: Cross multiply
   2,303.55x = 3,178.92 × 1,255.61
4. Step 4: Simplify right side
   2,303.55x = 3,991,461.57
5. Step 5: Solve for x
   x = 3,991,461.57/2,303.55
6. Step 6: Final answer
   x = 1,732.75