Finding the Fourth Proportional to 3,456.18, 5,184.41 and 1,115.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,456.18 : 5,184.41 = 1,115.89 : x
2. Step 2: Convert to fraction form
   3,456.18/5,184.41 = 1,115.89/x
3. Step 3: Cross multiply
   3,456.18x = 5,184.41 × 1,115.89
4. Step 4: Simplify right side
   3,456.18x = 5,785,212.73
5. Step 5: Solve for x
   x = 5,785,212.73/3,456.18
6. Step 6: Final answer
   x = 1,673.87