Finding the Fourth Proportional to 12,926.20, 17,835.81 and 8,683.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,926.20 : 17,835.81 = 8,683.42 : x
2. Step 2: Convert to fraction form
   12,926.20/17,835.81 = 8,683.42/x
3. Step 3: Cross multiply
   12,926.20x = 17,835.81 × 8,683.42
4. Step 4: Simplify right side
   12,926.20x = 154,875,829.27
5. Step 5: Solve for x
   x = 154,875,829.27/12,926.20
6. Step 6: Final answer
   x = 11,981.54