Finding the Fourth Proportional to 8,213.82, 11,339.67 and 5,424.18

Step by Step Solution

1. Step 1: Write the proportion equation
   8,213.82 : 11,339.67 = 5,424.18 : x
2. Step 2: Convert to fraction form
   8,213.82/11,339.67 = 5,424.18/x
3. Step 3: Cross multiply
   8,213.82x = 11,339.67 × 5,424.18
4. Step 4: Simplify right side
   8,213.82x = 61,508,411.22
5. Step 5: Solve for x
   x = 61,508,411.22/8,213.82
6. Step 6: Final answer
   x = 7,488.41