Finding the Fourth Proportional to 10,872.28, 15,003.69 and 5,904.28

Step by Step Solution

1. Step 1: Write the proportion equation
   10,872.28 : 15,003.69 = 5,904.28 : x
2. Step 2: Convert to fraction form
   10,872.28/15,003.69 = 5,904.28/x
3. Step 3: Cross multiply
   10,872.28x = 15,003.69 × 5,904.28
4. Step 4: Simplify right side
   10,872.28x = 88,585,986.79
5. Step 5: Solve for x
   x = 88,585,986.79/10,872.28
6. Step 6: Final answer
   x = 8,147.88