Finding the Fourth Proportional to 2,017.31, 2,783.17 and 1,319.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,017.31 : 2,783.17 = 1,319.09 : x
2. Step 2: Convert to fraction form
   2,017.31/2,783.17 = 1,319.09/x
3. Step 3: Cross multiply
   2,017.31x = 2,783.17 × 1,319.09
4. Step 4: Simplify right side
   2,017.31x = 3,671,251.72
5. Step 5: Solve for x
   x = 3,671,251.72/2,017.31
6. Step 6: Final answer
   x = 1,819.87