Finding the Fourth Proportional to 65,405.50, 90,259.59 and 35,597.50

Step by Step Solution

1. Step 1: Write the proportion equation
   65,405.50 : 90,259.59 = 35,597.50 : x
2. Step 2: Convert to fraction form
   65,405.50/90,259.59 = 35,597.50/x
3. Step 3: Cross multiply
   65,405.50x = 90,259.59 × 35,597.50
4. Step 4: Simplify right side
   65,405.50x = 3,213,015,755.03
5. Step 5: Solve for x
   x = 3,213,015,755.03/65,405.50
6. Step 6: Final answer
   x = 49,124.55