Finding the Fourth Proportional to 10,936.94, 16,386.56 and 8,611.82

Step by Step Solution

1. Step 1: Write the proportion equation
   10,936.94 : 16,386.56 = 8,611.82 : x
2. Step 2: Convert to fraction form
   10,936.94/16,386.56 = 8,611.82/x
3. Step 3: Cross multiply
   10,936.94x = 16,386.56 × 8,611.82
4. Step 4: Simplify right side
   10,936.94x = 141,118,105.14
5. Step 5: Solve for x
   x = 141,118,105.14/10,936.94
6. Step 6: Final answer
   x = 12,902.89