Finding the Fourth Proportional to 21,118.38, 31,706.73 and 10,737.42

Step by Step Solution

1. Step 1: Write the proportion equation
   21,118.38 : 31,706.73 = 10,737.42 : x
2. Step 2: Convert to fraction form
   21,118.38/31,706.73 = 10,737.42/x
3. Step 3: Cross multiply
   21,118.38x = 31,706.73 × 10,737.42
4. Step 4: Simplify right side
   21,118.38x = 340,448,476.84
5. Step 5: Solve for x
   x = 340,448,476.84/21,118.38
6. Step 6: Final answer
   x = 16,120.96