Finding the Fourth Proportional to 21,770.94, 30,043.89 and 13,273.05

Step by Step Solution

1. Step 1: Write the proportion equation
   21,770.94 : 30,043.89 = 13,273.05 : x
2. Step 2: Convert to fraction form
   21,770.94/30,043.89 = 13,273.05/x
3. Step 3: Cross multiply
   21,770.94x = 30,043.89 × 13,273.05
4. Step 4: Simplify right side
   21,770.94x = 398,774,054.16
5. Step 5: Solve for x
   x = 398,774,054.16/21,770.94
6. Step 6: Final answer
   x = 18,316.80