Finding the Fourth Proportional to 2,107.76, 3,155.16 and 1,796.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,107.76 : 3,155.16 = 1,796.72 : x
2. Step 2: Convert to fraction form
   2,107.76/3,155.16 = 1,796.72/x
3. Step 3: Cross multiply
   2,107.76x = 3,155.16 × 1,796.72
4. Step 4: Simplify right side
   2,107.76x = 5,668,939.08
5. Step 5: Solve for x
   x = 5,668,939.08/2,107.76
6. Step 6: Final answer
   x = 2,689.56