Finding the Fourth Proportional to 21,093.33, 31,624.37 and 12,771.39

Step by Step Solution

1. Step 1: Write the proportion equation
   21,093.33 : 31,624.37 = 12,771.39 : x
2. Step 2: Convert to fraction form
   21,093.33/31,624.37 = 12,771.39/x
3. Step 3: Cross multiply
   21,093.33x = 31,624.37 × 12,771.39
4. Step 4: Simplify right side
   21,093.33x = 403,887,159.35
5. Step 5: Solve for x
   x = 403,887,159.35/21,093.33
6. Step 6: Final answer
   x = 19,147.63