Finding the Fourth Proportional to 9,715.26, 13,457.82 and 9,518.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,715.26 : 13,457.82 = 9,518.42 : x
2. Step 2: Convert to fraction form
   9,715.26/13,457.82 = 9,518.42/x
3. Step 3: Cross multiply
   9,715.26x = 13,457.82 × 9,518.42
4. Step 4: Simplify right side
   9,715.26x = 128,097,183.04
5. Step 5: Solve for x
   x = 128,097,183.04/9,715.26
6. Step 6: Final answer
   x = 13,185.15