Finding the Fourth Proportional to 8,964.72, 12,367.92 and 5,426.64

Step by Step Solution

1. Step 1: Write the proportion equation
   8,964.72 : 12,367.92 = 5,426.64 : x
2. Step 2: Convert to fraction form
   8,964.72/12,367.92 = 5,426.64/x
3. Step 3: Cross multiply
   8,964.72x = 12,367.92 × 5,426.64
4. Step 4: Simplify right side
   8,964.72x = 67,116,249.39
5. Step 5: Solve for x
   x = 67,116,249.39/8,964.72
6. Step 6: Final answer
   x = 7,486.71