Finding the Fourth Proportional to 2,105.45, 2,905.52 and 1,173.95

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105.45 : 2,905.52 = 1,173.95 : x
2. Step 2: Convert to fraction form
   2,105.45/2,905.52 = 1,173.95/x
3. Step 3: Cross multiply
   2,105.45x = 2,905.52 × 1,173.95
4. Step 4: Simplify right side
   2,105.45x = 3,410,914.81
5. Step 5: Solve for x
   x = 3,410,914.81/2,105.45
6. Step 6: Final answer
   x = 1,620.04