Finding the Fourth Proportional to 8,083.78, 12,138.41 and 4,811.47

Step by Step Solution

1. Step 1: Write the proportion equation
   8,083.78 : 12,138.41 = 4,811.47 : x
2. Step 2: Convert to fraction form
   8,083.78/12,138.41 = 4,811.47/x
3. Step 3: Cross multiply
   8,083.78x = 12,138.41 × 4,811.47
4. Step 4: Simplify right side
   8,083.78x = 58,403,595.56
5. Step 5: Solve for x
   x = 58,403,595.56/8,083.78
6. Step 6: Final answer
   x = 7,224.79