Finding the Fourth Proportional to 2,057.38, 2,839.15 and 1,173.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,057.38 : 2,839.15 = 1,173.12 : x
2. Step 2: Convert to fraction form
   2,057.38/2,839.15 = 1,173.12/x
3. Step 3: Cross multiply
   2,057.38x = 2,839.15 × 1,173.12
4. Step 4: Simplify right side
   2,057.38x = 3,330,654.47
5. Step 5: Solve for x
   x = 3,330,654.47/2,057.38
6. Step 6: Final answer
   x = 1,618.88