Finding the Fourth Proportional to 21,085.37, 31,633.25 and 14,857.55

Step by Step Solution

1. Step 1: Write the proportion equation
   21,085.37 : 31,633.25 = 14,857.55 : x
2. Step 2: Convert to fraction form
   21,085.37/31,633.25 = 14,857.55/x
3. Step 3: Cross multiply
   21,085.37x = 31,633.25 × 14,857.55
4. Step 4: Simplify right side
   21,085.37x = 469,992,593.54
5. Step 5: Solve for x
   x = 469,992,593.54/21,085.37
6. Step 6: Final answer
   x = 22,289.99