Finding the Fourth Proportional to 5,042.89, 7,559.47 and 2,578.87

Step by Step Solution

1. Step 1: Write the proportion equation
   5,042.89 : 7,559.47 = 2,578.87 : x
2. Step 2: Convert to fraction form
   5,042.89/7,559.47 = 2,578.87/x
3. Step 3: Cross multiply
   5,042.89x = 7,559.47 × 2,578.87
4. Step 4: Simplify right side
   5,042.89x = 19,494,890.40
5. Step 5: Solve for x
   x = 19,494,890.40/5,042.89
6. Step 6: Final answer
   x = 3,865.82