Finding the Fourth Proportional to 10,872.54, 16,315.29 and 3,947.58

Step by Step Solution

1. Step 1: Write the proportion equation
   10,872.54 : 16,315.29 = 3,947.58 : x
2. Step 2: Convert to fraction form
   10,872.54/16,315.29 = 3,947.58/x
3. Step 3: Cross multiply
   10,872.54x = 16,315.29 × 3,947.58
4. Step 4: Simplify right side
   10,872.54x = 64,405,912.50
5. Step 5: Solve for x
   x = 64,405,912.50/10,872.54
6. Step 6: Final answer
   x = 5,923.72