Finding the Fourth Proportional to 2,057.59, 2,839.53 and 1,173.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,057.59 : 2,839.53 = 1,173.61 : x
2. Step 2: Convert to fraction form
   2,057.59/2,839.53 = 1,173.61/x
3. Step 3: Cross multiply
   2,057.59x = 2,839.53 × 1,173.61
4. Step 4: Simplify right side
   2,057.59x = 3,332,500.80
5. Step 5: Solve for x
   x = 3,332,500.80/2,057.59
6. Step 6: Final answer
   x = 1,619.61