Finding the Fourth Proportional to 11,715.21, 16,185.15 and 9,823.46

Step by Step Solution

1. Step 1: Write the proportion equation
   11,715.21 : 16,185.15 = 9,823.46 : x
2. Step 2: Convert to fraction form
   11,715.21/16,185.15 = 9,823.46/x
3. Step 3: Cross multiply
   11,715.21x = 16,185.15 × 9,823.46
4. Step 4: Simplify right side
   11,715.21x = 158,994,092.69
5. Step 5: Solve for x
   x = 158,994,092.69/11,715.21
6. Step 6: Final answer
   x = 13,571.60