Finding the Fourth Proportional to 3,519.15, 5,279.49 and 1,054.14

Step by Step Solution

1. Step 1: Write the proportion equation
   3,519.15 : 5,279.49 = 1,054.14 : x
2. Step 2: Convert to fraction form
   3,519.15/5,279.49 = 1,054.14/x
3. Step 3: Cross multiply
   3,519.15x = 5,279.49 × 1,054.14
4. Step 4: Simplify right side
   3,519.15x = 5,565,321.59
5. Step 5: Solve for x
   x = 5,565,321.59/3,519.15
6. Step 6: Final answer
   x = 1,581.44