Finding the Fourth Proportional to 23,160, 31,962.96 and 13,224

Step by Step Solution

1. Step 1: Write the proportion equation
   23,160 : 31,962.96 = 13,224 : x
2. Step 2: Convert to fraction form
   23,160/31,962.96 = 13,224/x
3. Step 3: Cross multiply
   23,160x = 31,962.96 × 13,224
4. Step 4: Simplify right side
   23,160x = 422,678,183.04
5. Step 5: Solve for x
   x = 422,678,183.04/23,160
6. Step 6: Final answer
   x = 18,250.35