Finding the Fourth Proportional to 13,667.16, 18,874.22 and 9,429.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,667.16 : 18,874.22 = 9,429.18 : x
2. Step 2: Convert to fraction form
   13,667.16/18,874.22 = 9,429.18/x
3. Step 3: Cross multiply
   13,667.16x = 18,874.22 × 9,429.18
4. Step 4: Simplify right side
   13,667.16x = 177,968,299.82
5. Step 5: Solve for x
   x = 177,968,299.82/13,667.16
6. Step 6: Final answer
   x = 13,021.60