Finding the Fourth Proportional to 2,791.08, 4,180.71 and 1,328.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,791.08 : 4,180.71 = 1,328.76 : x
2. Step 2: Convert to fraction form
   2,791.08/4,180.71 = 1,328.76/x
3. Step 3: Cross multiply
   2,791.08x = 4,180.71 × 1,328.76
4. Step 4: Simplify right side
   2,791.08x = 5,555,160.22
5. Step 5: Solve for x
   x = 5,555,160.22/2,791.08
6. Step 6: Final answer
   x = 1,990.33