Finding the Fourth Proportional to 8,969.72, 12,383.78 and 5,784.57

Step by Step Solution

1. Step 1: Write the proportion equation
   8,969.72 : 12,383.78 = 5,784.57 : x
2. Step 2: Convert to fraction form
   8,969.72/12,383.78 = 5,784.57/x
3. Step 3: Cross multiply
   8,969.72x = 12,383.78 × 5,784.57
4. Step 4: Simplify right side
   8,969.72x = 71,634,813.35
5. Step 5: Solve for x
   x = 71,634,813.35/8,969.72
6. Step 6: Final answer
   x = 7,986.30