Finding the Fourth Proportional to 65,448, 90,318.24 and 35,640

Step by Step Solution

1. Step 1: Write the proportion equation
   65,448 : 90,318.24 = 35,640 : x
2. Step 2: Convert to fraction form
   65,448/90,318.24 = 35,640/x
3. Step 3: Cross multiply
   65,448x = 90,318.24 × 35,640
4. Step 4: Simplify right side
   65,448x = 3,218,942,073.60
5. Step 5: Solve for x
   x = 3,218,942,073.60/65,448
6. Step 6: Final answer
   x = 49,183.20