Finding the Fourth Proportional to 105,504.37, 145,597.83 and 65,217.09

Step by Step Solution

1. Step 1: Write the proportion equation
   105,504.37 : 145,597.83 = 65,217.09 : x
2. Step 2: Convert to fraction form
   105,504.37/145,597.83 = 65,217.09/x
3. Step 3: Cross multiply
   105,504.37x = 145,597.83 × 65,217.09
4. Step 4: Simplify right side
   105,504.37x = 9,495,466,782.91
5. Step 5: Solve for x
   x = 9,495,466,782.91/105,504.37
6. Step 6: Final answer
   x = 90,000.70