Finding the Fourth Proportional to 2,105.25, 2,905.25 and 1,173.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105.25 : 2,905.25 = 1,173.75 : x
2. Step 2: Convert to fraction form
   2,105.25/2,905.25 = 1,173.75/x
3. Step 3: Cross multiply
   2,105.25x = 2,905.25 × 1,173.75
4. Step 4: Simplify right side
   2,105.25x = 3,410,031.32
5. Step 5: Solve for x
   x = 3,410,031.32/2,105.25
6. Step 6: Final answer
   x = 1,619.78