Finding the Fourth Proportional to 13,669.69, 18,868.82 and 8,499.61

Step by Step Solution

1. Step 1: Write the proportion equation
   13,669.69 : 18,868.82 = 8,499.61 : x
2. Step 2: Convert to fraction form
   13,669.69/18,868.82 = 8,499.61/x
3. Step 3: Cross multiply
   13,669.69x = 18,868.82 × 8,499.61
4. Step 4: Simplify right side
   13,669.69x = 160,377,611.16
5. Step 5: Solve for x
   x = 160,377,611.16/13,669.69
6. Step 6: Final answer
   x = 11,732.35