Finding the Fourth Proportional to 8,500.79, 12,732.69 and 4,109

Step by Step Solution

1. Step 1: Write the proportion equation
   8,500.79 : 12,732.69 = 4,109 : x
2. Step 2: Convert to fraction form
   8,500.79/12,732.69 = 4,109/x
3. Step 3: Cross multiply
   8,500.79x = 12,732.69 × 4,109
4. Step 4: Simplify right side
   8,500.79x = 52,318,623.21
5. Step 5: Solve for x
   x = 52,318,623.21/8,500.79
6. Step 6: Final answer
   x = 6,154.56