Finding the Fourth Proportional to 8,821.52, 12,173.60 and 5,284.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,821.52 : 12,173.60 = 5,284.72 : x
2. Step 2: Convert to fraction form
   8,821.52/12,173.60 = 5,284.72/x
3. Step 3: Cross multiply
   8,821.52x = 12,173.60 × 5,284.72
4. Step 4: Simplify right side
   8,821.52x = 64,334,067.39
5. Step 5: Solve for x
   x = 64,334,067.39/8,821.52
6. Step 6: Final answer
   x = 7,292.86