Finding the Fourth Proportional to 21,085.39, 31,633.28 and 14,857.56

Step by Step Solution

1. Step 1: Write the proportion equation
   21,085.39 : 31,633.28 = 14,857.56 : x
2. Step 2: Convert to fraction form
   21,085.39/31,633.28 = 14,857.56/x
3. Step 3: Cross multiply
   21,085.39x = 31,633.28 × 14,857.56
4. Step 4: Simplify right side
   21,085.39x = 469,993,355.60
5. Step 5: Solve for x
   x = 469,993,355.60/21,085.39
6. Step 6: Final answer
   x = 22,290.00