Finding the Fourth Proportional to 72,918.43, 109,383.82 and 20,327.96

Step by Step Solution

1. Step 1: Write the proportion equation
   72,918.43 : 109,383.82 = 20,327.96 : x
2. Step 2: Convert to fraction form
   72,918.43/109,383.82 = 20,327.96/x
3. Step 3: Cross multiply
   72,918.43x = 109,383.82 × 20,327.96
4. Step 4: Simplify right side
   72,918.43x = 2,223,550,140.25
5. Step 5: Solve for x
   x = 2,223,550,140.25/72,918.43
6. Step 6: Final answer
   x = 30,493.67