Finding the Fourth Proportional to 10,885.20, 16,352.10 and 10,472.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,885.20 : 16,352.10 = 10,472.10 : x
2. Step 2: Convert to fraction form
   10,885.20/16,352.10 = 10,472.10/x
3. Step 3: Cross multiply
   10,885.20x = 16,352.10 × 10,472.10
4. Step 4: Simplify right side
   10,885.20x = 171,240,826.41
5. Step 5: Solve for x
   x = 171,240,826.41/10,885.20
6. Step 6: Final answer
   x = 15,731.53