Finding the Fourth Proportional to 38,644.86, 53,329.83 and 21,879.42

Step by Step Solution

1. Step 1: Write the proportion equation
   38,644.86 : 53,329.83 = 21,879.42 : x
2. Step 2: Convert to fraction form
   38,644.86/53,329.83 = 21,879.42/x
3. Step 3: Cross multiply
   38,644.86x = 53,329.83 × 21,879.42
4. Step 4: Simplify right side
   38,644.86x = 1,166,825,749.10
5. Step 5: Solve for x
   x = 1,166,825,749.10/38,644.86
6. Step 6: Final answer
   x = 30,193.56