Finding the Fourth Proportional to 2,340.94, 3,230.56 and 1,278.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,340.94 : 3,230.56 = 1,278.72 : x
2. Step 2: Convert to fraction form
   2,340.94/3,230.56 = 1,278.72/x
3. Step 3: Cross multiply
   2,340.94x = 3,230.56 × 1,278.72
4. Step 4: Simplify right side
   2,340.94x = 4,130,978.49
5. Step 5: Solve for x
   x = 4,130,978.49/2,340.94
6. Step 6: Final answer
   x = 1,764.67