Finding the Fourth Proportional to 72,673.67, 109,010.55 and 20,083.20

Step by Step Solution

1. Step 1: Write the proportion equation
   72,673.67 : 109,010.55 = 20,083.20 : x
2. Step 2: Convert to fraction form
   72,673.67/109,010.55 = 20,083.20/x
3. Step 3: Cross multiply
   72,673.67x = 109,010.55 × 20,083.20
4. Step 4: Simplify right side
   72,673.67x = 2,189,280,677.76
5. Step 5: Solve for x
   x = 2,189,280,677.76/72,673.67
6. Step 6: Final answer
   x = 30,124.81