Finding the Fourth Proportional to 2,772.10, 4,158.07 and 1,128.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,772.10 : 4,158.07 = 1,128.24 : x
2. Step 2: Convert to fraction form
   2,772.10/4,158.07 = 1,128.24/x
3. Step 3: Cross multiply
   2,772.10x = 4,158.07 × 1,128.24
4. Step 4: Simplify right side
   2,772.10x = 4,691,300.90
5. Step 5: Solve for x
   x = 4,691,300.90/2,772.10
6. Step 6: Final answer
   x = 1,692.33