Finding the Fourth Proportional to 21,894.39, 30,215.37 and 13,393.83

Step by Step Solution

1. Step 1: Write the proportion equation
   21,894.39 : 30,215.37 = 13,393.83 : x
2. Step 2: Convert to fraction form
   21,894.39/30,215.37 = 13,393.83/x
3. Step 3: Cross multiply
   21,894.39x = 30,215.37 × 13,393.83
4. Step 4: Simplify right side
   21,894.39x = 404,699,529.17
5. Step 5: Solve for x
   x = 404,699,529.17/21,894.39
6. Step 6: Final answer
   x = 18,484.17