Finding the Fourth Proportional to 8,510.39, 12,766.61 and 3,578.71

Step by Step Solution

1. Step 1: Write the proportion equation
   8,510.39 : 12,766.61 = 3,578.71 : x
2. Step 2: Convert to fraction form
   8,510.39/12,766.61 = 3,578.71/x
3. Step 3: Cross multiply
   8,510.39x = 12,766.61 × 3,578.71
4. Step 4: Simplify right side
   8,510.39x = 45,687,959.93
5. Step 5: Solve for x
   x = 45,687,959.93/8,510.39
6. Step 6: Final answer
   x = 5,368.49