Finding the Fourth Proportional to 21,771.32, 30,041.73 and 13,270.37

Step by Step Solution

1. Step 1: Write the proportion equation
   21,771.32 : 30,041.73 = 13,270.37 : x
2. Step 2: Convert to fraction form
   21,771.32/30,041.73 = 13,270.37/x
3. Step 3: Cross multiply
   21,771.32x = 30,041.73 × 13,270.37
4. Step 4: Simplify right side
   21,771.32x = 398,664,722.33
5. Step 5: Solve for x
   x = 398,664,722.33/21,771.32
6. Step 6: Final answer
   x = 18,311.47