Finding the Fourth Proportional to 2,921.46, 4,384.25 and 1,278.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,921.46 : 4,384.25 = 1,278.48 : x
2. Step 2: Convert to fraction form
   2,921.46/4,384.25 = 1,278.48/x
3. Step 3: Cross multiply
   2,921.46x = 4,384.25 × 1,278.48
4. Step 4: Simplify right side
   2,921.46x = 5,605,169.55
5. Step 5: Solve for x
   x = 5,605,169.55/2,921.46
6. Step 6: Final answer
   x = 1,918.62