Finding the Fourth Proportional to 8,384.78, 12,578.72 and 2,762.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,384.78 : 12,578.72 = 2,762.78 : x
2. Step 2: Convert to fraction form
   8,384.78/12,578.72 = 2,762.78/x
3. Step 3: Cross multiply
   8,384.78x = 12,578.72 × 2,762.78
4. Step 4: Simplify right side
   8,384.78x = 34,752,159.33
5. Step 5: Solve for x
   x = 34,752,159.33/8,384.78
6. Step 6: Final answer
   x = 4,144.67