Finding the Fourth Proportional to 8,728.50, 12,044.12 and 5,371.86

Step by Step Solution

1. Step 1: Write the proportion equation
   8,728.50 : 12,044.12 = 5,371.86 : x
2. Step 2: Convert to fraction form
   8,728.50/12,044.12 = 5,371.86/x
3. Step 3: Cross multiply
   8,728.50x = 12,044.12 × 5,371.86
4. Step 4: Simplify right side
   8,728.50x = 64,699,299.60
5. Step 5: Solve for x
   x = 64,699,299.60/8,728.50
6. Step 6: Final answer
   x = 7,412.42