Finding the Fourth Proportional to 10,871.28, 15,002.32 and 5,903.28

Step by Step Solution

1. Step 1: Write the proportion equation
   10,871.28 : 15,002.32 = 5,903.28 : x
2. Step 2: Convert to fraction form
   10,871.28/15,002.32 = 5,903.28/x
3. Step 3: Cross multiply
   10,871.28x = 15,002.32 × 5,903.28
4. Step 4: Simplify right side
   10,871.28x = 88,562,895.61
5. Step 5: Solve for x
   x = 88,562,895.61/10,871.28
6. Step 6: Final answer
   x = 8,146.50