Finding the Fourth Proportional to 2,039.95, 3,059.27 and 578.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,039.95 : 3,059.27 = 578.71 : x
2. Step 2: Convert to fraction form
   2,039.95/3,059.27 = 578.71/x
3. Step 3: Cross multiply
   2,039.95x = 3,059.27 × 578.71
4. Step 4: Simplify right side
   2,039.95x = 1,770,427.25
5. Step 5: Solve for x
   x = 1,770,427.25/2,039.95
6. Step 6: Final answer
   x = 867.88