Finding the Fourth Proportional to 43,391.82, 65,086.50 and 13,811.42

Step by Step Solution

1. Step 1: Write the proportion equation
   43,391.82 : 65,086.50 = 13,811.42 : x
2. Step 2: Convert to fraction form
   43,391.82/65,086.50 = 13,811.42/x
3. Step 3: Cross multiply
   43,391.82x = 65,086.50 × 13,811.42
4. Step 4: Simplify right side
   43,391.82x = 898,936,987.83
5. Step 5: Solve for x
   x = 898,936,987.83/43,391.82
6. Step 6: Final answer
   x = 20,716.74