Finding the Fourth Proportional to 21,185.23, 31,727.31 and 11,801.98

Step by Step Solution

1. Step 1: Write the proportion equation
   21,185.23 : 31,727.31 = 11,801.98 : x
2. Step 2: Convert to fraction form
   21,185.23/31,727.31 = 11,801.98/x
3. Step 3: Cross multiply
   21,185.23x = 31,727.31 × 11,801.98
4. Step 4: Simplify right side
   21,185.23x = 374,445,078.07
5. Step 5: Solve for x
   x = 374,445,078.07/21,185.23
6. Step 6: Final answer
   x = 17,674.82