Finding the Fourth Proportional to 2,858.05, 4,289.49 and 1,127.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,858.05 : 4,289.49 = 1,127.89 : x
2. Step 2: Convert to fraction form
   2,858.05/4,289.49 = 1,127.89/x
3. Step 3: Cross multiply
   2,858.05x = 4,289.49 × 1,127.89
4. Step 4: Simplify right side
   2,858.05x = 4,838,072.88
5. Step 5: Solve for x
   x = 4,838,072.88/2,858.05
6. Step 6: Final answer
   x = 1,692.79