Finding the Fourth Proportional to 20,379.83, 30,554.34 and 13,361.61

Step by Step Solution

1. Step 1: Write the proportion equation
   20,379.83 : 30,554.34 = 13,361.61 : x
2. Step 2: Convert to fraction form
   20,379.83/30,554.34 = 13,361.61/x
3. Step 3: Cross multiply
   20,379.83x = 30,554.34 × 13,361.61
4. Step 4: Simplify right side
   20,379.83x = 408,255,105.07
5. Step 5: Solve for x
   x = 408,255,105.07/20,379.83
6. Step 6: Final answer
   x = 20,032.31