Finding the Fourth Proportional to 65,669.50, 90,623.91 and 35,861.50

Step by Step Solution

1. Step 1: Write the proportion equation
   65,669.50 : 90,623.91 = 35,861.50 : x
2. Step 2: Convert to fraction form
   65,669.50/90,623.91 = 35,861.50/x
3. Step 3: Cross multiply
   65,669.50x = 90,623.91 × 35,861.50
4. Step 4: Simplify right side
   65,669.50x = 3,249,909,348.47
5. Step 5: Solve for x
   x = 3,249,909,348.47/65,669.50
6. Step 6: Final answer
   x = 49,488.87