Finding the Fourth Proportional to 65,328.72, 90,153 and 35,520.72

Step by Step Solution

1. Step 1: Write the proportion equation
   65,328.72 : 90,153 = 35,520.72 : x
2. Step 2: Convert to fraction form
   65,328.72/90,153 = 35,520.72/x
3. Step 3: Cross multiply
   65,328.72x = 90,153 × 35,520.72
4. Step 4: Simplify right side
   65,328.72x = 3,202,299,470.16
5. Step 5: Solve for x
   x = 3,202,299,470.16/65,328.72
6. Step 6: Final answer
   x = 49,018.25