Finding the Fourth Proportional to 8,216.64, 12,320.64 and 7,067.52

Step by Step Solution

1. Step 1: Write the proportion equation
   8,216.64 : 12,320.64 = 7,067.52 : x
2. Step 2: Convert to fraction form
   8,216.64/12,320.64 = 7,067.52/x
3. Step 3: Cross multiply
   8,216.64x = 12,320.64 × 7,067.52
4. Step 4: Simplify right side
   8,216.64x = 87,076,369.61
5. Step 5: Solve for x
   x = 87,076,369.61/8,216.64
6. Step 6: Final answer
   x = 10,597.56