Finding the Fourth Proportional to 2,105, 2,904.90 and 1,173.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105 : 2,904.90 = 1,173.50 : x
2. Step 2: Convert to fraction form
   2,105/2,904.90 = 1,173.50/x
3. Step 3: Cross multiply
   2,105x = 2,904.90 × 1,173.50
4. Step 4: Simplify right side
   2,105x = 3,408,900.15
5. Step 5: Solve for x
   x = 3,408,900.15/2,105
6. Step 6: Final answer
   x = 1,619.43