Finding the Fourth Proportional to 21,100.50, 31,646.43 and 10,706.58

Step by Step Solution

1. Step 1: Write the proportion equation
   21,100.50 : 31,646.43 = 10,706.58 : x
2. Step 2: Convert to fraction form
   21,100.50/31,646.43 = 10,706.58/x
3. Step 3: Cross multiply
   21,100.50x = 31,646.43 × 10,706.58
4. Step 4: Simplify right side
   21,100.50x = 338,825,034.51
5. Step 5: Solve for x
   x = 338,825,034.51/21,100.50
6. Step 6: Final answer
   x = 16,057.68