Finding the Fourth Proportional to 2,196.95, 3,290.15 and 1,257.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.95 : 3,290.15 = 1,257.05 : x
2. Step 2: Convert to fraction form
   2,196.95/3,290.15 = 1,257.05/x
3. Step 3: Cross multiply
   2,196.95x = 3,290.15 × 1,257.05
4. Step 4: Simplify right side
   2,196.95x = 4,135,879.87
5. Step 5: Solve for x
   x = 4,135,879.87/2,196.95
6. Step 6: Final answer
   x = 1,882.55