Finding the Fourth Proportional to 2,081.70, 3,119.31 and 1,587.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.70 : 3,119.31 = 1,587.33 : x
2. Step 2: Convert to fraction form
   2,081.70/3,119.31 = 1,587.33/x
3. Step 3: Cross multiply
   2,081.70x = 3,119.31 × 1,587.33
4. Step 4: Simplify right side
   2,081.70x = 4,951,374.34
5. Step 5: Solve for x
   x = 4,951,374.34/2,081.70
6. Step 6: Final answer
   x = 2,378.52