Finding the Fourth Proportional to 65,083.20, 89,805.42 and 36,402.72

Step by Step Solution

1. Step 1: Write the proportion equation
   65,083.20 : 89,805.42 = 36,402.72 : x
2. Step 2: Convert to fraction form
   65,083.20/89,805.42 = 36,402.72/x
3. Step 3: Cross multiply
   65,083.20x = 89,805.42 × 36,402.72
4. Step 4: Simplify right side
   65,083.20x = 3,269,161,558.74
5. Step 5: Solve for x
   x = 3,269,161,558.74/65,083.20
6. Step 6: Final answer
   x = 50,230.50