Finding the Fourth Proportional to 2,057.20, 2,838.86 and 1,173.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,057.20 : 2,838.86 = 1,173.29 : x
2. Step 2: Convert to fraction form
   2,057.20/2,838.86 = 1,173.29/x
3. Step 3: Cross multiply
   2,057.20x = 2,838.86 × 1,173.29
4. Step 4: Simplify right side
   2,057.20x = 3,330,791.86
5. Step 5: Solve for x
   x = 3,330,791.86/2,057.20
6. Step 6: Final answer
   x = 1,619.09