Finding the Fourth Proportional to 21,071.24, 31,623.72 and 10,540.83

Step by Step Solution

1. Step 1: Write the proportion equation
   21,071.24 : 31,623.72 = 10,540.83 : x
2. Step 2: Convert to fraction form
   21,071.24/31,623.72 = 10,540.83/x
3. Step 3: Cross multiply
   21,071.24x = 31,623.72 × 10,540.83
4. Step 4: Simplify right side
   21,071.24x = 333,340,335.55
5. Step 5: Solve for x
   x = 333,340,335.55/21,071.24
6. Step 6: Final answer
   x = 15,819.68