Finding the Fourth Proportional to 13,424.28, 18,522.69 and 8,118.06

Step by Step Solution

1. Step 1: Write the proportion equation
   13,424.28 : 18,522.69 = 8,118.06 : x
2. Step 2: Convert to fraction form
   13,424.28/18,522.69 = 8,118.06/x
3. Step 3: Cross multiply
   13,424.28x = 18,522.69 × 8,118.06
4. Step 4: Simplify right side
   13,424.28x = 150,368,308.78
5. Step 5: Solve for x
   x = 150,368,308.78/13,424.28
6. Step 6: Final answer
   x = 11,201.22