Finding the Fourth Proportional to 12,578.96, 18,851.42 and 4,783.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,578.96 : 18,851.42 = 4,783.52 : x
2. Step 2: Convert to fraction form
   12,578.96/18,851.42 = 4,783.52/x
3. Step 3: Cross multiply
   12,578.96x = 18,851.42 × 4,783.52
4. Step 4: Simplify right side
   12,578.96x = 90,176,144.60
5. Step 5: Solve for x
   x = 90,176,144.60/12,578.96
6. Step 6: Final answer
   x = 7,168.81