Finding the Fourth Proportional to 2,772, 4,159.88 and 1,040.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,772 : 4,159.88 = 1,040.72 : x
2. Step 2: Convert to fraction form
   2,772/4,159.88 = 1,040.72/x
3. Step 3: Cross multiply
   2,772x = 4,159.88 × 1,040.72
4. Step 4: Simplify right side
   2,772x = 4,329,270.31
5. Step 5: Solve for x
   x = 4,329,270.31/2,772
6. Step 6: Final answer
   x = 1,561.79