Finding the Fourth Proportional to 3,450.20, 5,174.94 and 1,111.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,450.20 : 5,174.94 = 1,111.89 : x
2. Step 2: Convert to fraction form
   3,450.20/5,174.94 = 1,111.89/x
3. Step 3: Cross multiply
   3,450.20x = 5,174.94 × 1,111.89
4. Step 4: Simplify right side
   3,450.20x = 5,753,964.04
5. Step 5: Solve for x
   x = 5,753,964.04/3,450.20
6. Step 6: Final answer
   x = 1,667.72