Finding the Fourth Proportional to 4,128.03, 5,692.28 and 3,119.31

Step by Step Solution

1. Step 1: Write the proportion equation
   4,128.03 : 5,692.28 = 3,119.31 : x
2. Step 2: Convert to fraction form
   4,128.03/5,692.28 = 3,119.31/x
3. Step 3: Cross multiply
   4,128.03x = 5,692.28 × 3,119.31
4. Step 4: Simplify right side
   4,128.03x = 17,755,970.33
5. Step 5: Solve for x
   x = 17,755,970.33/4,128.03
6. Step 6: Final answer
   x = 4,301.32