Finding the Fourth Proportional to 10,816.49, 16,196.42 and 8,696.86

Step by Step Solution

1. Step 1: Write the proportion equation
   10,816.49 : 16,196.42 = 8,696.86 : x
2. Step 2: Convert to fraction form
   10,816.49/16,196.42 = 8,696.86/x
3. Step 3: Cross multiply
   10,816.49x = 16,196.42 × 8,696.86
4. Step 4: Simplify right side
   10,816.49x = 140,857,891.51
5. Step 5: Solve for x
   x = 140,857,891.51/10,816.49
6. Step 6: Final answer
   x = 13,022.51