Finding the Fourth Proportional to 2,105.62, 2,905.94 and 1,161.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105.62 : 2,905.94 = 1,161.59 : x
2. Step 2: Convert to fraction form
   2,105.62/2,905.94 = 1,161.59/x
3. Step 3: Cross multiply
   2,105.62x = 2,905.94 × 1,161.59
4. Step 4: Simplify right side
   2,105.62x = 3,375,510.84
5. Step 5: Solve for x
   x = 3,375,510.84/2,105.62
6. Step 6: Final answer
   x = 1,603.10