Finding the Fourth Proportional to 65,399.50, 90,251.32 and 35,591.50

Step by Step Solution

1. Step 1: Write the proportion equation
   65,399.50 : 90,251.32 = 35,591.50 : x
2. Step 2: Convert to fraction form
   65,399.50/90,251.32 = 35,591.50/x
3. Step 3: Cross multiply
   65,399.50x = 90,251.32 × 35,591.50
4. Step 4: Simplify right side
   65,399.50x = 3,212,179,855.78
5. Step 5: Solve for x
   x = 3,212,179,855.78/65,399.50
6. Step 6: Final answer
   x = 49,116.28