Finding the Fourth Proportional to 21,086.14, 31,634.40 and 14,858.31

Step by Step Solution

1. Step 1: Write the proportion equation
   21,086.14 : 31,634.40 = 14,858.31 : x
2. Step 2: Convert to fraction form
   21,086.14/31,634.40 = 14,858.31/x
3. Step 3: Cross multiply
   21,086.14x = 31,634.40 × 14,858.31
4. Step 4: Simplify right side
   21,086.14x = 470,033,721.86
5. Step 5: Solve for x
   x = 470,033,721.86/21,086.14
6. Step 6: Final answer
   x = 22,291.12