Finding the Fourth Proportional to 2,057.57, 2,839.50 and 1,173.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,057.57 : 2,839.50 = 1,173.39 : x
2. Step 2: Convert to fraction form
   2,057.57/2,839.50 = 1,173.39/x
3. Step 3: Cross multiply
   2,057.57x = 2,839.50 × 1,173.39
4. Step 4: Simplify right side
   2,057.57x = 3,331,840.91
5. Step 5: Solve for x
   x = 3,331,840.91/2,057.57
6. Step 6: Final answer
   x = 1,619.31