Finding the Fourth Proportional to 72,379.58, 108,575.85 and 19,789.34

Step by Step Solution

1. Step 1: Write the proportion equation
   72,379.58 : 108,575.85 = 19,789.34 : x
2. Step 2: Convert to fraction form
   72,379.58/108,575.85 = 19,789.34/x
3. Step 3: Cross multiply
   72,379.58x = 108,575.85 × 19,789.34
4. Step 4: Simplify right side
   72,379.58x = 2,148,644,411.44
5. Step 5: Solve for x
   x = 2,148,644,411.44/72,379.58
6. Step 6: Final answer
   x = 29,685.78