Finding the Fourth Proportional to 2,162.45, 3,245.49 and 1,123.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,162.45 : 3,245.49 = 1,123.09 : x
2. Step 2: Convert to fraction form
   2,162.45/3,245.49 = 1,123.09/x
3. Step 3: Cross multiply
   2,162.45x = 3,245.49 × 1,123.09
4. Step 4: Simplify right side
   2,162.45x = 3,644,977.36
5. Step 5: Solve for x
   x = 3,644,977.36/2,162.45
6. Step 6: Final answer
   x = 1,685.58