Finding the Fourth Proportional to 2,105.45, 2,905.39 and 1,161.19

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105.45 : 2,905.39 = 1,161.19 : x
2. Step 2: Convert to fraction form
   2,105.45/2,905.39 = 1,161.19/x
3. Step 3: Cross multiply
   2,105.45x = 2,905.39 × 1,161.19
4. Step 4: Simplify right side
   2,105.45x = 3,373,709.81
5. Step 5: Solve for x
   x = 3,373,709.81/2,105.45
6. Step 6: Final answer
   x = 1,602.37