Finding the Fourth Proportional to 3,105.75, 4,284.72 and 1,778.74

Step by Step Solution

1. Step 1: Write the proportion equation
   3,105.75 : 4,284.72 = 1,778.74 : x
2. Step 2: Convert to fraction form
   3,105.75/4,284.72 = 1,778.74/x
3. Step 3: Cross multiply
   3,105.75x = 4,284.72 × 1,778.74
4. Step 4: Simplify right side
   3,105.75x = 7,621,402.85
5. Step 5: Solve for x
   x = 7,621,402.85/3,105.75
6. Step 6: Final answer
   x = 2,453.97