Finding the Fourth Proportional to 8,623.15, 12,951.12 and 5,359.05

Step by Step Solution

1. Step 1: Write the proportion equation
   8,623.15 : 12,951.12 = 5,359.05 : x
2. Step 2: Convert to fraction form
   8,623.15/12,951.12 = 5,359.05/x
3. Step 3: Cross multiply
   8,623.15x = 12,951.12 × 5,359.05
4. Step 4: Simplify right side
   8,623.15x = 69,405,699.64
5. Step 5: Solve for x
   x = 69,405,699.64/8,623.15
6. Step 6: Final answer
   x = 8,048.76