Finding the Fourth Proportional to 65,498.88, 90,280.32 and 49,509.12

Step by Step Solution

1. Step 1: Write the proportion equation
   65,498.88 : 90,280.32 = 49,509.12 : x
2. Step 2: Convert to fraction form
   65,498.88/90,280.32 = 49,509.12/x
3. Step 3: Cross multiply
   65,498.88x = 90,280.32 × 49,509.12
4. Step 4: Simplify right side
   65,498.88x = 4,469,699,196.52
5. Step 5: Solve for x
   x = 4,469,699,196.52/65,498.88
6. Step 6: Final answer
   x = 68,240.85