Finding the Fourth Proportional to 8,728.06, 12,042.57 and 5,371.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,728.06 : 12,042.57 = 5,371.42 : x
2. Step 2: Convert to fraction form
   8,728.06/12,042.57 = 5,371.42/x
3. Step 3: Cross multiply
   8,728.06x = 12,042.57 × 5,371.42
4. Step 4: Simplify right side
   8,728.06x = 64,685,701.35
5. Step 5: Solve for x
   x = 64,685,701.35/8,728.06
6. Step 6: Final answer
   x = 7,411.23