Finding the Fourth Proportional to 72,469.82, 108,705.05 and 19,879.90

Step by Step Solution

1. Step 1: Write the proportion equation
   72,469.82 : 108,705.05 = 19,879.90 : x
2. Step 2: Convert to fraction form
   72,469.82/108,705.05 = 19,879.90/x
3. Step 3: Cross multiply
   72,469.82x = 108,705.05 × 19,879.90
4. Step 4: Simplify right side
   72,469.82x = 2,161,045,523.50
5. Step 5: Solve for x
   x = 2,161,045,523.50/72,469.82
6. Step 6: Final answer
   x = 29,819.94