Finding the Fourth Proportional to 21,103.46, 31,638.78 and 10,568.07

Step by Step Solution

1. Step 1: Write the proportion equation
   21,103.46 : 31,638.78 = 10,568.07 : x
2. Step 2: Convert to fraction form
   21,103.46/31,638.78 = 10,568.07/x
3. Step 3: Cross multiply
   21,103.46x = 31,638.78 × 10,568.07
4. Step 4: Simplify right side
   21,103.46x = 334,360,812.03
5. Step 5: Solve for x
   x = 334,360,812.03/21,103.46
6. Step 6: Final answer
   x = 15,843.88