Finding the Fourth Proportional to 13,224.42, 18,243.41 and 7,918.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,224.42 : 18,243.41 = 7,918.25 : x
2. Step 2: Convert to fraction form
   13,224.42/18,243.41 = 7,918.25/x
3. Step 3: Cross multiply
   13,224.42x = 18,243.41 × 7,918.25
4. Step 4: Simplify right side
   13,224.42x = 144,455,750.42
5. Step 5: Solve for x
   x = 144,455,750.42/13,224.42
6. Step 6: Final answer
   x = 10,923.41