Finding the Fourth Proportional to 2,055.70, 2,836.80 and 1,171.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,055.70 : 2,836.80 = 1,171.72 : x
2. Step 2: Convert to fraction form
   2,055.70/2,836.80 = 1,171.72/x
3. Step 3: Cross multiply
   2,055.70x = 2,836.80 × 1,171.72
4. Step 4: Simplify right side
   2,055.70x = 3,323,935.30
5. Step 5: Solve for x
   x = 3,323,935.30/2,055.70
6. Step 6: Final answer
   x = 1,616.94