Finding the Fourth Proportional to 8,384.44, 12,578.72 and 2,540.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,384.44 : 12,578.72 = 2,540.72 : x
2. Step 2: Convert to fraction form
   8,384.44/12,578.72 = 2,540.72/x
3. Step 3: Cross multiply
   8,384.44x = 12,578.72 × 2,540.72
4. Step 4: Simplify right side
   8,384.44x = 31,959,005.48
5. Step 5: Solve for x
   x = 31,959,005.48/8,384.44
6. Step 6: Final answer
   x = 3,811.70