Finding the Fourth Proportional to 2,858.52, 4,287.54 and 1,319.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,858.52 : 4,287.54 = 1,319.52 : x
2. Step 2: Convert to fraction form
   2,858.52/4,287.54 = 1,319.52/x
3. Step 3: Cross multiply
   2,858.52x = 4,287.54 × 1,319.52
4. Step 4: Simplify right side
   2,858.52x = 5,657,494.78
5. Step 5: Solve for x
   x = 5,657,494.78/2,858.52
6. Step 6: Final answer
   x = 1,979.17