Finding the Fourth Proportional to 2,105.49, 2,905.76 and 1,161.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105.49 : 2,905.76 = 1,161.37 : x
2. Step 2: Convert to fraction form
   2,105.49/2,905.76 = 1,161.37/x
3. Step 3: Cross multiply
   2,105.49x = 2,905.76 × 1,161.37
4. Step 4: Simplify right side
   2,105.49x = 3,374,662.49
5. Step 5: Solve for x
   x = 3,374,662.49/2,105.49
6. Step 6: Final answer
   x = 1,602.79