Finding the Fourth Proportional to 65,380.50, 90,225.09 and 35,572.50

Step by Step Solution

1. Step 1: Write the proportion equation
   65,380.50 : 90,225.09 = 35,572.50 : x
2. Step 2: Convert to fraction form
   65,380.50/90,225.09 = 35,572.50/x
3. Step 3: Cross multiply
   65,380.50x = 90,225.09 × 35,572.50
4. Step 4: Simplify right side
   65,380.50x = 3,209,532,014.03
5. Step 5: Solve for x
   x = 3,209,532,014.03/65,380.50
6. Step 6: Final answer
   x = 49,090.05