Finding the Fourth Proportional to 2,772.89, 4,158.12 and 1,040.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,772.89 : 4,158.12 = 1,040.30 : x
2. Step 2: Convert to fraction form
   2,772.89/4,158.12 = 1,040.30/x
3. Step 3: Cross multiply
   2,772.89x = 4,158.12 × 1,040.30
4. Step 4: Simplify right side
   2,772.89x = 4,325,666.24
5. Step 5: Solve for x
   x = 4,325,666.24/2,772.89
6. Step 6: Final answer
   x = 1,559.99