Finding the Fourth Proportional to 2,057.53, 2,839.62 and 1,173.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,057.53 : 2,839.62 = 1,173.55 : x
2. Step 2: Convert to fraction form
   2,057.53/2,839.62 = 1,173.55/x
3. Step 3: Cross multiply
   2,057.53x = 2,839.62 × 1,173.55
4. Step 4: Simplify right side
   2,057.53x = 3,332,436.05
5. Step 5: Solve for x
   x = 3,332,436.05/2,057.53
6. Step 6: Final answer
   x = 1,619.63