Finding the Fourth Proportional to 3,418.12, 5,123.94 and 1,108

Step by Step Solution

1. Step 1: Write the proportion equation
   3,418.12 : 5,123.94 = 1,108 : x
2. Step 2: Convert to fraction form
   3,418.12/5,123.94 = 1,108/x
3. Step 3: Cross multiply
   3,418.12x = 5,123.94 × 1,108
4. Step 4: Simplify right side
   3,418.12x = 5,677,325.52
5. Step 5: Solve for x
   x = 5,677,325.52/3,418.12
6. Step 6: Final answer
   x = 1,660.95