Finding the Fourth Proportional to 3,111.45, 4,665.34 and 1,163.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,111.45 : 4,665.34 = 1,163.80 : x
2. Step 2: Convert to fraction form
   3,111.45/4,665.34 = 1,163.80/x
3. Step 3: Cross multiply
   3,111.45x = 4,665.34 × 1,163.80
4. Step 4: Simplify right side
   3,111.45x = 5,429,522.69
5. Step 5: Solve for x
   x = 5,429,522.69/3,111.45
6. Step 6: Final answer
   x = 1,745.01