Finding the Fourth Proportional to 21,033.89, 31,534.18 and 10,498.49

Step by Step Solution

1. Step 1: Write the proportion equation
   21,033.89 : 31,534.18 = 10,498.49 : x
2. Step 2: Convert to fraction form
   21,033.89/31,534.18 = 10,498.49/x
3. Step 3: Cross multiply
   21,033.89x = 31,534.18 × 10,498.49
4. Step 4: Simplify right side
   21,033.89x = 331,061,273.39
5. Step 5: Solve for x
   x = 331,061,273.39/21,033.89
6. Step 6: Final answer
   x = 15,739.42