Finding the Fourth Proportional to 8,216.18, 11,338.78 and 5,072.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,216.18 : 11,338.78 = 5,072.42 : x
2. Step 2: Convert to fraction form
   8,216.18/11,338.78 = 5,072.42/x
3. Step 3: Cross multiply
   8,216.18x = 11,338.78 × 5,072.42
4. Step 4: Simplify right side
   8,216.18x = 57,515,054.45
5. Step 5: Solve for x
   x = 57,515,054.45/8,216.18
6. Step 6: Final answer
   x = 7,000.22