Finding the Fourth Proportional to 105,247.50, 145,241.55 and 60,535.50

Step by Step Solution

1. Step 1: Write the proportion equation
   105,247.50 : 145,241.55 = 60,535.50 : x
2. Step 2: Convert to fraction form
   105,247.50/145,241.55 = 60,535.50/x
3. Step 3: Cross multiply
   105,247.50x = 145,241.55 × 60,535.50
4. Step 4: Simplify right side
   105,247.50x = 8,792,269,850.03
5. Step 5: Solve for x
   x = 8,792,269,850.03/105,247.50
6. Step 6: Final answer
   x = 83,538.99