Finding the Fourth Proportional to 21,013.89, 31,337.62 and 19,849.31

Step by Step Solution

1. Step 1: Write the proportion equation
   21,013.89 : 31,337.62 = 19,849.31 : x
2. Step 2: Convert to fraction form
   21,013.89/31,337.62 = 19,849.31/x
3. Step 3: Cross multiply
   21,013.89x = 31,337.62 × 19,849.31
4. Step 4: Simplify right side
   21,013.89x = 622,030,134.04
5. Step 5: Solve for x
   x = 622,030,134.04/21,013.89
6. Step 6: Final answer
   x = 29,600.90