Finding the Fourth Proportional to 65,578.50, 90,498.33 and 35,770.50

Step by Step Solution

1. Step 1: Write the proportion equation
   65,578.50 : 90,498.33 = 35,770.50 : x
2. Step 2: Convert to fraction form
   65,578.50/90,498.33 = 35,770.50/x
3. Step 3: Cross multiply
   65,578.50x = 90,498.33 × 35,770.50
4. Step 4: Simplify right side
   65,578.50x = 3,237,170,513.27
5. Step 5: Solve for x
   x = 3,237,170,513.27/65,578.50
6. Step 6: Final answer
   x = 49,363.29