Finding the Fourth Proportional to 2,273.46, 3,137.52 and 1,278.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,273.46 : 3,137.52 = 1,278.72 : x
2. Step 2: Convert to fraction form
   2,273.46/3,137.52 = 1,278.72/x
3. Step 3: Cross multiply
   2,273.46x = 3,137.52 × 1,278.72
4. Step 4: Simplify right side
   2,273.46x = 4,012,009.57
5. Step 5: Solve for x
   x = 4,012,009.57/2,273.46
6. Step 6: Final answer
   x = 1,764.72