Finding the Fourth Proportional to 2,057.42, 2,839.16 and 1,173.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,057.42 : 2,839.16 = 1,173.05 : x
2. Step 2: Convert to fraction form
   2,057.42/2,839.16 = 1,173.05/x
3. Step 3: Cross multiply
   2,057.42x = 2,839.16 × 1,173.05
4. Step 4: Simplify right side
   2,057.42x = 3,330,456.58
5. Step 5: Solve for x
   x = 3,330,456.58/2,057.42
6. Step 6: Final answer
   x = 1,618.76