Finding the Fourth Proportional to 8,574.64, 12,845.32 and 5,644.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,574.64 : 12,845.32 = 5,644.12 : x
2. Step 2: Convert to fraction form
   8,574.64/12,845.32 = 5,644.12/x
3. Step 3: Cross multiply
   8,574.64x = 12,845.32 × 5,644.12
4. Step 4: Simplify right side
   8,574.64x = 72,500,527.52
5. Step 5: Solve for x
   x = 72,500,527.52/8,574.64
6. Step 6: Final answer
   x = 8,455.23