Finding the Fourth Proportional to 8,867.78, 12,236.72 and 5,675.47

Step by Step Solution

1. Step 1: Write the proportion equation
   8,867.78 : 12,236.72 = 5,675.47 : x
2. Step 2: Convert to fraction form
   8,867.78/12,236.72 = 5,675.47/x
3. Step 3: Cross multiply
   8,867.78x = 12,236.72 × 5,675.47
4. Step 4: Simplify right side
   8,867.78x = 69,449,110.21
5. Step 5: Solve for x
   x = 69,449,110.21/8,867.78
6. Step 6: Final answer
   x = 7,831.62