Finding the Fourth Proportional to 2,303.40, 3,178.71 and 1,255.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,303.40 : 3,178.71 = 1,255.47 : x
2. Step 2: Convert to fraction form
   2,303.40/3,178.71 = 1,255.47/x
3. Step 3: Cross multiply
   2,303.40x = 3,178.71 × 1,255.47
4. Step 4: Simplify right side
   2,303.40x = 3,990,775.04
5. Step 5: Solve for x
   x = 3,990,775.04/2,303.40
6. Step 6: Final answer
   x = 1,732.56