Finding the Fourth Proportional to 6,651.20, 9,178.72 and 3,667.15

Step by Step Solution

1. Step 1: Write the proportion equation
   6,651.20 : 9,178.72 = 3,667.15 : x
2. Step 2: Convert to fraction form
   6,651.20/9,178.72 = 3,667.15/x
3. Step 3: Cross multiply
   6,651.20x = 9,178.72 × 3,667.15
4. Step 4: Simplify right side
   6,651.20x = 33,659,743.05
5. Step 5: Solve for x
   x = 33,659,743.05/6,651.20
6. Step 6: Final answer
   x = 5,060.70