Finding the Fourth Proportional to 2,105.39, 2,905.41 and 1,173.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105.39 : 2,905.41 = 1,173.89 : x
2. Step 2: Convert to fraction form
   2,105.39/2,905.41 = 1,173.89/x
3. Step 3: Cross multiply
   2,105.39x = 2,905.41 × 1,173.89
4. Step 4: Simplify right side
   2,105.39x = 3,410,631.74
5. Step 5: Solve for x
   x = 3,410,631.74/2,105.39
6. Step 6: Final answer
   x = 1,619.95