Finding the Fourth Proportional to 2,105.13, 2,905.10 and 1,160.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105.13 : 2,905.10 = 1,160.96 : x
2. Step 2: Convert to fraction form
   2,105.13/2,905.10 = 1,160.96/x
3. Step 3: Cross multiply
   2,105.13x = 2,905.10 × 1,160.96
4. Step 4: Simplify right side
   2,105.13x = 3,372,690.37
5. Step 5: Solve for x
   x = 3,372,690.37/2,105.13
6. Step 6: Final answer
   x = 1,602.13