Finding the Fourth Proportional to 13,786.24, 20,667.64 and 5,472.12

Step by Step Solution

1. Step 1: Write the proportion equation
   13,786.24 : 20,667.64 = 5,472.12 : x
2. Step 2: Convert to fraction form
   13,786.24/20,667.64 = 5,472.12/x
3. Step 3: Cross multiply
   13,786.24x = 20,667.64 × 5,472.12
4. Step 4: Simplify right side
   13,786.24x = 113,095,806.20
5. Step 5: Solve for x
   x = 113,095,806.20/13,786.24
6. Step 6: Final answer
   x = 8,203.53