Finding the Fourth Proportional to 3,383.98, 5,075.78 and 1,075.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,383.98 : 5,075.78 = 1,075.30 : x
2. Step 2: Convert to fraction form
   3,383.98/5,075.78 = 1,075.30/x
3. Step 3: Cross multiply
   3,383.98x = 5,075.78 × 1,075.30
4. Step 4: Simplify right side
   3,383.98x = 5,457,963.54
5. Step 5: Solve for x
   x = 5,457,963.54/3,383.98
6. Step 6: Final answer
   x = 1,612.89