Finding the Fourth Proportional to 12,910.27, 17,816.27 and 8,431.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,910.27 : 17,816.27 = 8,431.38 : x
2. Step 2: Convert to fraction form
   12,910.27/17,816.27 = 8,431.38/x
3. Step 3: Cross multiply
   12,910.27x = 17,816.27 × 8,431.38
4. Step 4: Simplify right side
   12,910.27x = 150,215,611.31
5. Step 5: Solve for x
   x = 150,215,611.31/12,910.27
6. Step 6: Final answer
   x = 11,635.36