Finding the Fourth Proportional to 20,725.82, 31,096.49 and 12,411.71

Step by Step Solution

1. Step 1: Write the proportion equation
   20,725.82 : 31,096.49 = 12,411.71 : x
2. Step 2: Convert to fraction form
   20,725.82/31,096.49 = 12,411.71/x
3. Step 3: Cross multiply
   20,725.82x = 31,096.49 × 12,411.71
4. Step 4: Simplify right side
   20,725.82x = 385,960,398.36
5. Step 5: Solve for x
   x = 385,960,398.36/20,725.82
6. Step 6: Final answer
   x = 18,622.21