Finding the Fourth Proportional to 3,450.98, 5,177.33 and 1,111.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,450.98 : 5,177.33 = 1,111.20 : x
2. Step 2: Convert to fraction form
   3,450.98/5,177.33 = 1,111.20/x
3. Step 3: Cross multiply
   3,450.98x = 5,177.33 × 1,111.20
4. Step 4: Simplify right side
   3,450.98x = 5,753,043.54
5. Step 5: Solve for x
   x = 5,753,043.54/3,450.98
6. Step 6: Final answer
   x = 1,667.08