Finding the Fourth Proportional to 2,797.78, 4,196.42 and 1,316.65

Step by Step Solution

1. Step 1: Write the proportion equation
   2,797.78 : 4,196.42 = 1,316.65 : x
2. Step 2: Convert to fraction form
   2,797.78/4,196.42 = 1,316.65/x
3. Step 3: Cross multiply
   2,797.78x = 4,196.42 × 1,316.65
4. Step 4: Simplify right side
   2,797.78x = 5,525,195.41
5. Step 5: Solve for x
   x = 5,525,195.41/2,797.78
6. Step 6: Final answer
   x = 1,974.85