Finding the Fourth Proportional to 8,535.46, 12,783.53 and 8,239.95

Step by Step Solution

1. Step 1: Write the proportion equation
   8,535.46 : 12,783.53 = 8,239.95 : x
2. Step 2: Convert to fraction form
   8,535.46/12,783.53 = 8,239.95/x
3. Step 3: Cross multiply
   8,535.46x = 12,783.53 × 8,239.95
4. Step 4: Simplify right side
   8,535.46x = 105,335,648.02
5. Step 5: Solve for x
   x = 105,335,648.02/8,535.46
6. Step 6: Final answer
   x = 12,340.95