Finding the Fourth Proportional to 65,128.73, 89,871.53 and 36,440.69

Step by Step Solution

1. Step 1: Write the proportion equation
   65,128.73 : 89,871.53 = 36,440.69 : x
2. Step 2: Convert to fraction form
   65,128.73/89,871.53 = 36,440.69/x
3. Step 3: Cross multiply
   65,128.73x = 89,871.53 × 36,440.69
4. Step 4: Simplify right side
   65,128.73x = 3,274,979,932.99
5. Step 5: Solve for x
   x = 3,274,979,932.99/65,128.73
6. Step 6: Final answer
   x = 50,284.72