Finding the Fourth Proportional to 8,956.22, 12,358.61 and 5,178.82

Step by Step Solution

1. Step 1: Write the proportion equation
   8,956.22 : 12,358.61 = 5,178.82 : x
2. Step 2: Convert to fraction form
   8,956.22/12,358.61 = 5,178.82/x
3. Step 3: Cross multiply
   8,956.22x = 12,358.61 × 5,178.82
4. Step 4: Simplify right side
   8,956.22x = 64,002,959.85
5. Step 5: Solve for x
   x = 64,002,959.85/8,956.22
6. Step 6: Final answer
   x = 7,146.20