Finding the Fourth Proportional to 8,815.32, 12,164.73 and 5,280.48

Step by Step Solution

1. Step 1: Write the proportion equation
   8,815.32 : 12,164.73 = 5,280.48 : x
2. Step 2: Convert to fraction form
   8,815.32/12,164.73 = 5,280.48/x
3. Step 3: Cross multiply
   8,815.32x = 12,164.73 × 5,280.48
4. Step 4: Simplify right side
   8,815.32x = 64,235,613.47
5. Step 5: Solve for x
   x = 64,235,613.47/8,815.32
6. Step 6: Final answer
   x = 7,286.82