Finding the Fourth Proportional to 2,519.12, 3,774.83 and 1,057.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,519.12 : 3,774.83 = 1,057.47 : x
2. Step 2: Convert to fraction form
   2,519.12/3,774.83 = 1,057.47/x
3. Step 3: Cross multiply
   2,519.12x = 3,774.83 × 1,057.47
4. Step 4: Simplify right side
   2,519.12x = 3,991,769.48
5. Step 5: Solve for x
   x = 3,991,769.48/2,519.12
6. Step 6: Final answer
   x = 1,584.59