Finding the Fourth Proportional to 2,105.43, 2,905.49 and 1,161.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105.43 : 2,905.49 = 1,161.27 : x
2. Step 2: Convert to fraction form
   2,105.43/2,905.49 = 1,161.27/x
3. Step 3: Cross multiply
   2,105.43x = 2,905.49 × 1,161.27
4. Step 4: Simplify right side
   2,105.43x = 3,374,052.57
5. Step 5: Solve for x
   x = 3,374,052.57/2,105.43
6. Step 6: Final answer
   x = 1,602.55