Finding the Fourth Proportional to 3,576.57, 5,365.37 and 1,111.61

Step by Step Solution

1. Step 1: Write the proportion equation
   3,576.57 : 5,365.37 = 1,111.61 : x
2. Step 2: Convert to fraction form
   3,576.57/5,365.37 = 1,111.61/x
3. Step 3: Cross multiply
   3,576.57x = 5,365.37 × 1,111.61
4. Step 4: Simplify right side
   3,576.57x = 5,964,166.56
5. Step 5: Solve for x
   x = 5,964,166.56/3,576.57
6. Step 6: Final answer
   x = 1,667.57