Finding the Fourth Proportional to 8,653.50, 12,961.89 and 8,350.38

Step by Step Solution

1. Step 1: Write the proportion equation
   8,653.50 : 12,961.89 = 8,350.38 : x
2. Step 2: Convert to fraction form
   8,653.50/12,961.89 = 8,350.38/x
3. Step 3: Cross multiply
   8,653.50x = 12,961.89 × 8,350.38
4. Step 4: Simplify right side
   8,653.50x = 108,236,707.02
5. Step 5: Solve for x
   x = 108,236,707.02/8,653.50
6. Step 6: Final answer
   x = 12,507.85