Finding the Fourth Proportional to 8,578.98, 12,871.51 and 3,030.89

Step by Step Solution

1. Step 1: Write the proportion equation
   8,578.98 : 12,871.51 = 3,030.89 : x
2. Step 2: Convert to fraction form
   8,578.98/12,871.51 = 3,030.89/x
3. Step 3: Cross multiply
   8,578.98x = 12,871.51 × 3,030.89
4. Step 4: Simplify right side
   8,578.98x = 39,012,059.01
5. Step 5: Solve for x
   x = 39,012,059.01/8,578.98
6. Step 6: Final answer
   x = 4,547.40