Finding the Fourth Proportional to 13,786.32, 20,667.12 and 5,460.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,786.32 : 20,667.12 = 5,460.72 : x
2. Step 2: Convert to fraction form
   13,786.32/20,667.12 = 5,460.72/x
3. Step 3: Cross multiply
   13,786.32x = 20,667.12 × 5,460.72
4. Step 4: Simplify right side
   13,786.32x = 112,857,355.53
5. Step 5: Solve for x
   x = 112,857,355.53/13,786.32
6. Step 6: Final answer
   x = 8,186.18