Finding the Fourth Proportional to 10,823.88, 14,945.40 and 8,472.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,823.88 : 14,945.40 = 8,472.72 : x
2. Step 2: Convert to fraction form
   10,823.88/14,945.40 = 8,472.72/x
3. Step 3: Cross multiply
   10,823.88x = 14,945.40 × 8,472.72
4. Step 4: Simplify right side
   10,823.88x = 126,628,189.49
5. Step 5: Solve for x
   x = 126,628,189.49/10,823.88
6. Step 6: Final answer
   x = 11,698.96