Finding the Fourth Proportional to 8,728.56, 12,043.89 and 5,192.91

Step by Step Solution

1. Step 1: Write the proportion equation
   8,728.56 : 12,043.89 = 5,192.91 : x
2. Step 2: Convert to fraction form
   8,728.56/12,043.89 = 5,192.91/x
3. Step 3: Cross multiply
   8,728.56x = 12,043.89 × 5,192.91
4. Step 4: Simplify right side
   8,728.56x = 62,542,836.82
5. Step 5: Solve for x
   x = 62,542,836.82/8,728.56
6. Step 6: Final answer
   x = 7,165.31