Finding the Fourth Proportional to 21,086.39, 31,634.78 and 14,858.56

Step by Step Solution

1. Step 1: Write the proportion equation
   21,086.39 : 31,634.78 = 14,858.56 : x
2. Step 2: Convert to fraction form
   21,086.39/31,634.78 = 14,858.56/x
3. Step 3: Cross multiply
   21,086.39x = 31,634.78 × 14,858.56
4. Step 4: Simplify right side
   21,086.39x = 470,047,276.72
5. Step 5: Solve for x
   x = 470,047,276.72/21,086.39
6. Step 6: Final answer
   x = 22,291.50