Finding the Fourth Proportional to 12,885.69, 17,790.82 and 9,896.19

Step by Step Solution

1. Step 1: Write the proportion equation
   12,885.69 : 17,790.82 = 9,896.19 : x
2. Step 2: Convert to fraction form
   12,885.69/17,790.82 = 9,896.19/x
3. Step 3: Cross multiply
   12,885.69x = 17,790.82 × 9,896.19
4. Step 4: Simplify right side
   12,885.69x = 176,061,299.19
5. Step 5: Solve for x
   x = 176,061,299.19/12,885.69
6. Step 6: Final answer
   x = 13,663.32